# The Agent Economy A public directory of the infrastructure agents use to talk, pay, trade, and take instruction. The Agent Economy listings (https://theagenteconomy.si/data/listings.json), licensed under CC BY 4.0. License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). On adoption pages a missing figure reads None published. On the spend controls table a cell stays UNKNOWN when the checked document does not state the control. This file does not rank listings. Run by Max Curnin, Executive Chairman of Accords. Accords is listed under the same criteria as every other entry and is never ranked or styled differently. # Listings ## A2A URL: https://theagenteconomy.si/listings/a2a Category: Protocols Status: live Open source: yes Tags: discovery, agent-cards, json-rpc Last verified: 2026-10-16 A2A is a live listing under Protocols. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. The listing is open source. Tags are discovery, agent-cards, json-rpc. Last verified 2026-10-16. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. Sources: - Linux Foundation launch of the Agent2Agent Protocol project: https://www.linuxfoundation.org/press/linux-foundation-launches-the-agent2agent-protocol-project-to-enable-secure-intelligent-communication-between-ai-agents - A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ ## Accords URL: https://theagenteconomy.si/listings/accords Category: Exchanges and markets Status: live Open source: yes Tags: assets, capacity, proof Last verified: 2026-10-16 Accords is a live listing under Exchanges and markets. Transaction infrastructure that structures supply, rights, workflows, and proof for asset and capacity markets. Its open CLP protocol binds signatures, authorization, and payment events into content-addressed proof bundles. The listing is open source. Transaction infrastructure that structures supply, rights, workflows, and proof for asset and capacity markets. Its open CLP protocol binds signatures, authorization, and payment events into content-addressed proof bundles. Sources: - Accords site: https://www.accords.ai/ - Accords OS and CLP: https://www.accords.ai/rail - ContractLane repository: https://github.com/accordsai/contractlane ## Agent Network Protocol URL: https://theagenteconomy.si/listings/anp Category: Protocols Status: beta Open source: yes Tags: identity, discovery, did Last verified: 2026-10-19 Agent Network Protocol is a beta listing under Protocols. Protocol suite whose 1.2 release covers agent identity, naming, description, and discovery, with DID authentication for did:wba and did:web. Authorization and payment specs are still drafts, and group end to end encryption is a candidate. The listing is open source. Protocol suite whose 1.2 release covers agent identity, naming, description, and discovery, with DID authentication for did:wba and did:web. Authorization and payment specs are still drafts, and group end to end encryption is a candidate. Sources: - ANP specification index: https://github.com/agent-network-protocol/AgentNetworkProtocol/blob/HEAD/README.md ## Agentic Commerce Protocol URL: https://theagenteconomy.si/listings/agentic-commerce-protocol Category: Protocols Status: live Open source: yes Tags: commerce, checkout, delegation Last verified: 2026-10-16 Agentic Commerce Protocol is a live listing under Protocols. Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. The listing is open source. Tags are commerce, checkout, delegation. Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. Sources: - Stripe documentation for the Agentic Commerce Protocol: https://docs.stripe.com/agentic-commerce/protocols/acp - Agentic Commerce Protocol getting started: https://agentic-commerce-protocol.com/docs/commerce/guides/get-started ## AGNTCY URL: https://theagenteconomy.si/listings/agntcy Category: Protocols Status: live Open source: yes Tags: discovery, identity, messaging Last verified: 2026-10-16 AGNTCY is a live listing under Protocols. Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. The listing is open source. Tags are discovery, identity, messaging. Last verified 2026-10-16. Protocols covers shared languages for discovery, tool calls, commerce, and agent to agent work. Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. Sources: - AGNTCY project site: https://agntcy.org/ - Linux Foundation welcome of the AGNTCY project: https://www.linuxfoundation.org/press/linux-foundation-welcomes-the-agntcy-project-to-standardize-open-multi-agent-system-infrastructure-and-break-down-ai-agent-silos ## Akash Network URL: https://theagenteconomy.si/listings/akash-network Category: Exchanges and markets Status: live Open source: yes Tags: compute, capacity, marketplace Last verified: 2026-10-16 Akash Network is a live listing under Exchanges and markets. Decentralized compute marketplace where independent providers bid to host workloads. The listing is open source. Tags are compute, capacity, marketplace. Last verified 2026-10-16. Exchanges and markets covers marketplaces for compute, data, assets, capacity, and agent services. Decentralized compute marketplace where independent providers bid to host workloads. Sources: - Akash Network introduction: https://akash.network/docs/getting-started/what-is-akash/ ## AP2 URL: https://theagenteconomy.si/listings/ap2 Category: Payment rails Status: beta Open source: yes Tags: mandates, cards, stablecoins Last verified: 2026-10-19 AP2 is a beta listing under Payment rails. Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. The listing is open source. Tags are mandates, cards, stablecoins. Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. Sources: - AP2 protocol documentation: https://ap2-protocol.org/ - Google Cloud announcement of AP2: https://cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol - AP2 v0.2.0 release on GitHub: https://github.com/google-agentic-commerce/AP2/releases/tag/v0.2.0 ## Bittensor URL: https://theagenteconomy.si/listings/bittensor Category: Exchanges and markets Status: live Open source: yes Tags: compute, data, incentives Last verified: 2026-10-19 Bittensor is a live listing under Exchanges and markets. Open network where independent subnets produce digital commodities and the chain pays contributors. The listing is open source. Tags are compute, data, incentives. Last verified 2026-10-19. Exchanges and markets covers marketplaces for compute, data, assets, capacity, and agent services. Open network where independent subnets produce digital commodities and the chain pays contributors. Sources: - Bittensor site: https://www.bittensor.com/ ## Claude Agent SDK URL: https://theagenteconomy.si/listings/claude-agent-sdk Category: Frameworks and runtimes Status: live Open source: no Tags: orchestration, tools, permissions Last verified: 2026-10-16 Claude Agent SDK is a live listing under Frameworks and runtimes. Library that runs the Claude Code agent loop in a process you operate, with built in tools, permissions, sessions, hooks, and subagents. The listing is not open source. Tags are orchestration, tools, permissions. Library that runs the Claude Code agent loop in a process you operate, with built in tools, permissions, sessions, hooks, and subagents. Sources: - Claude Agent SDK overview: https://code.claude.com/docs/en/agent-sdk/overview ## Coinbase Agentic Wallet URL: https://theagenteconomy.si/listings/coinbase-agentic-wallet Category: Payment rails Status: live Open source: no Tags: wallets, stablecoins, http-402, spend-limits Last verified: 2026-10-19 Coinbase Agentic Wallet is a live listing under Payment rails. Wallet for agents on Coinbase Developer Platform. The agent holds USDC, sends, trades, and pays x402 services through the awal CLI and skills, under per session and per transaction caps, while keys stay in Coinbase infrastructure. The MCP version is labeled beta. The listing is not open source. Wallet for agents on Coinbase Developer Platform. The agent holds USDC, sends, trades, and pays x402 services through the awal CLI and skills, under per session and per transaction caps, while keys stay in Coinbase infrastructure. The MCP version is labeled beta. Sources: - Coinbase Agentic Wallet documentation overview: https://docs.cdp.coinbase.com/agentic-wallet/welcome - Coinbase Agentic Wallet CLI documentation: https://docs.cdp.coinbase.com/agentic-wallet/cli/welcome - Coinbase launch post: Introducing Agentic Wallets (Feb 11, 2026): https://www.coinbase.com/developer-platform/discover/launches/agentic-wallets ## CrewAI URL: https://theagenteconomy.si/listings/crewai Category: Frameworks and runtimes Status: live Open source: yes Tags: multi-agent, orchestration, python Last verified: 2026-10-16 CrewAI is a live listing under Frameworks and runtimes. Open source framework that pairs event driven Flows for control flow with Crews of role based agents that collaborate on a delegated task. The listing is open source. Tags are multi-agent, orchestration, python. Open source framework that pairs event driven Flows for control flow with Crews of role based agents that collaborate on a delegated task. Sources: - CrewAI introduction: https://docs.crewai.com/v1.15.28/en/introduction ## ERC-8004 URL: https://theagenteconomy.si/listings/erc-8004 Category: Identity and trust Status: designed Open source: yes Tags: registries, reputation, ethereum Last verified: 2026-10-16 ERC-8004 is a designed listing under Identity and trust. Draft Ethereum proposal for three registries: an ERC-721 identity that points at an agent registration file, a reputation registry, and a validation registry. The listing is open source. Tags are registries, reputation, ethereum. Draft Ethereum proposal for three registries: an ERC-721 identity that points at an agent registration file, a reputation registry, and a validation registry. Sources: - ERC-8004 Trustless Agents: https://eips.ethereum.org/EIPS/eip-8004 - ERC-8004 reference contracts: https://github.com/erc-8004/erc-8004-contracts ## Gensyn URL: https://theagenteconomy.si/listings/gensyn Category: Exchanges and markets Status: live Open source: no Tags: compute, data, information Last verified: 2026-10-16 Gensyn is a live listing under Exchanges and markets. Open infrastructure where humans and machines trade compute, data, and information in on-chain markets, with a peer-to-peer layer that carries MCP and A2A. The listing is not open source. Tags are compute, data, information. Open infrastructure where humans and machines trade compute, data, and information in on-chain markets, with a peer-to-peer layer that carries MCP and A2A. Sources: - Gensyn network documentation: https://docs.gensyn.network/ ## Google ADK URL: https://theagenteconomy.si/listings/google-adk Category: Frameworks and runtimes Status: live Open source: yes Tags: orchestration, multi-agent, tools Last verified: 2026-10-16 Google ADK is a live listing under Frameworks and runtimes. Open source framework for building, debugging, and deploying agents, including graph workflows and multi agent orchestration. The listing is open source. Tags are orchestration, multi-agent, tools. Last verified 2026-10-16. Frameworks and runtimes covers runtimes and sdks that execute the agent loop. Open source framework for building, debugging, and deploying agents, including graph workflows and multi agent orchestration. Sources: - Agent Development Kit documentation: https://adk.dev/ ## Guardrails AI URL: https://theagenteconomy.si/listings/guardrails-ai Category: Governance and mandates Status: live Open source: yes Tags: guardrails, validation, policy Last verified: 2026-10-16 Guardrails AI is a live listing under Governance and mandates. Python framework that runs input and output guards to detect and mitigate specific risks, and can also extract structured data from model output. The listing is open source. Tags are guardrails, validation, policy. Python framework that runs input and output guards to detect and mitigate specific risks, and can also extract structured data from model output. Sources: - Guardrails repository: https://github.com/guardrails-ai/guardrails ## Hedera Agent Accounts URL: https://theagenteconomy.si/listings/hedera-agent-accounts Category: Payment rails Status: designed Open source: no Tags: wallets, spend-limits Last verified: 2026-10-19 Hedera Agent Accounts is a designed listing under Payment rails. Owner funded spending account on Hedera. The owner sets a daily cap, a per transaction maximum, and a recipient allowlist in a smart contract, and can revoke the agent. Hedera says public testnet access is still forthcoming. The listing is not open source. Owner funded spending account on Hedera. The owner sets a daily cap, a per transaction maximum, and a recipient allowlist in a smart contract, and can revoke the agent. Hedera says public testnet access is still forthcoming. Sources: - Introducing Hedera Agent Accounts: https://hedera.com/blog/introducing-hedera-agent-accounts/ ## Invariant URL: https://theagenteconomy.si/listings/invariant Category: Governance and mandates Status: live Open source: no Tags: guardrails, policy, traces Last verified: 2026-10-16 Invariant is a live listing under Governance and mandates. Contextual security layer that checks an agent trace against declarative rules for tool calls, data flow, secrets, and looping. The listing is not open source. Tags are guardrails, policy, traces. Last verified 2026-10-16. Contextual security layer that checks an agent trace against declarative rules for tool calls, data flow, secrets, and looping. Sources: - Invariant Labs product page: https://invariantlabs.ai/docs - Invariant guardrails rule reference: https://invariantlabs-ai.github.io/docs/mcp-scan/guardrails-reference/ ## L402 URL: https://theagenteconomy.si/listings/l402 Category: Payment rails Status: live Open source: yes Tags: http-402, lightning, macaroons Last verified: 2026-10-16 L402 is a live listing under Payment rails. HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. The listing is open source. HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. Sources: - Lightning Labs L402 documentation: https://docs.lightning.engineering/the-lightning-network/l402 ## Lakera Guard URL: https://theagenteconomy.si/listings/lakera-guard Category: Governance and mandates Status: live Open source: no Tags: guardrails, tool-calls, policy Last verified: 2026-10-16 Lakera Guard is a live listing under Governance and mandates. Guard API that screens an agent conversation in one call, including tool definitions, tool calls, and tool results, against a project policy. The listing is not open source. Tags are guardrails, tool-calls, policy. Guard API that screens an agent conversation in one call, including tool definitions, tool calls, and tool results, against a project policy. Sources: - Lakera Guard API documentation: https://docs.lakera.ai/docs/api/guard ## LangGraph URL: https://theagenteconomy.si/listings/langgraph Category: Frameworks and runtimes Status: live Open source: yes Tags: orchestration, approvals, state Last verified: 2026-10-16 LangGraph is a live listing under Frameworks and runtimes. Low level orchestration runtime for long running stateful agents, with durable execution and human checkpoints inside the graph. The listing is open source. Tags are orchestration, approvals, state. Last verified 2026-10-16. Low level orchestration runtime for long running stateful agents, with durable execution and human checkpoints inside the graph. Sources: - LangGraph overview: https://docs.langchain.com/oss/python/langgraph/overview ## LiteLLM Proxy URL: https://theagenteconomy.si/listings/litellm Category: Governance and mandates Status: live Open source: yes Tags: budgets, spend-limits, guardrails Last verified: 2026-10-16 LiteLLM Proxy is a live listing under Governance and mandates. Open source proxy that enforces personal, team, and agent spend budgets on model calls when a database is connected, and can attach guardrails. The listing is open source. Tags are budgets, spend-limits, guardrails. Open source proxy that enforces personal, team, and agent spend budgets on model calls when a database is connected, and can attach guardrails. Sources: - LiteLLM proxy budgets: https://docs.litellm.ai/docs/proxy/users ## Machine Payments Protocol URL: https://theagenteconomy.si/listings/mpp Category: Payment rails Status: live Open source: yes Tags: http-402, cards, stablecoins Last verified: 2026-10-16 Machine Payments Protocol is a live listing under Payment rails. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. The listing is open source. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. Sources: - MPP protocol site: https://mpp.dev/ - Stripe documentation for MPP: https://docs.stripe.com/payments/machine/mpp ## Mastra URL: https://theagenteconomy.si/listings/mastra Category: Frameworks and runtimes Status: live Open source: yes Tags: typescript, orchestration, approvals Last verified: 2026-10-16 Mastra is a live listing under Frameworks and runtimes. Open source TypeScript framework for agents and workflows, with memory, tool approvals, and processors that can block or redact content. The listing is open source. Tags are typescript, orchestration, approvals. Last verified 2026-10-16. Open source TypeScript framework for agents and workflows, with memory, tool approvals, and processors that can block or redact content. Sources: - Mastra site: https://mastra.ai/ - Mastra guardrails: https://mastra.ai/docs/agents/guardrails ## MetaMask Agent Wallet URL: https://theagenteconomy.si/listings/metamask-agent-wallet Category: Payment rails Status: live Open source: no Tags: wallets, spend-limits, http-402 Last verified: 2026-10-19 MetaMask Agent Wallet is a live listing under Payment rails. Agent wallet CLI for sending tokens and paying x402 requests. Guard Mode can enforce address and recipient allowlists and a rolling 24 hour outflow limit, and it asks for 2FA outside that policy. The listing is not open source. Agent wallet CLI for sending tokens and paying x402 requests. Guard Mode can enforce address and recipient allowlists and a rolling 24 hour outflow limit, and it asks for 2FA outside that policy. Sources: - MetaMask Agent Wallet trading modes: https://docs.metamask.io/agent-wallet/reference/trading-modes/ - MetaMask Agent Wallet outflow policy: https://docs.metamask.io/agent-wallet/reference/outflow-policy/ ## Microsoft Agent Framework URL: https://theagenteconomy.si/listings/microsoft-agent-framework Category: Frameworks and runtimes Status: live Open source: yes Tags: multi-agent, orchestration, approvals Last verified: 2026-10-16 Microsoft Agent Framework is a live listing under Frameworks and runtimes. Open framework for building and orchestrating agents and multi agent workflows in Python and .NET, with graph workflows and human checkpoints. The listing is open source. Tags are multi-agent, orchestration, approvals. Open framework for building and orchestrating agents and multi agent workflows in Python and .NET, with graph workflows and human checkpoints. Sources: - Microsoft Agent Framework repository: https://github.com/microsoft/agent-framework/ ## Microsoft Entra Agent ID URL: https://theagenteconomy.si/listings/entra-agent-id Category: Identity and trust Status: live Open source: no Tags: enterprise, oauth, audit Last verified: 2026-10-16 Microsoft Entra Agent ID is a live listing under Identity and trust. Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. The listing is not open source. Tags are enterprise, oauth, audit. Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. Sources: - What is Microsoft Entra Agent ID: https://learn.microsoft.com/en-us/entra/agent-id/what-is-microsoft-entra-agent-id - Overview of agent identities in Microsoft Entra: https://learn.microsoft.com/en-us/entra/agent-id/agent-identities ## Model Context Protocol URL: https://theagenteconomy.si/listings/mcp Category: Protocols Status: live Open source: yes Tags: tools, resources, prompts Last verified: 2026-10-16 Model Context Protocol is a live listing under Protocols. Open protocol that connects LLM applications to external tools, resources, and prompts through a standard request interface. The listing is open source. Tags are tools, resources, prompts. Last verified 2026-10-16. Protocols covers shared languages for discovery, tool calls, commerce, and agent to agent work. Open protocol that connects LLM applications to external tools, resources, and prompts through a standard request interface. Sources: - Model Context Protocol specification: https://modelcontextprotocol.io/specification/2026-07-28 ## NeMo Guardrails URL: https://theagenteconomy.si/listings/nemo-guardrails Category: Governance and mandates Status: live Open source: yes Tags: guardrails, policy, tool-calls Last verified: 2026-10-16 NeMo Guardrails is a live listing under Governance and mandates. Open source toolkit for programmable rails that block, alter, or validate user inputs, model responses, and tool calls. The listing is open source. Tags are guardrails, policy, tool-calls. Last verified 2026-10-16. Open source toolkit for programmable rails that block, alter, or validate user inputs, model responses, and tool calls. Sources: - NVIDIA NeMo Guardrails overview: https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview ## Nevermined URL: https://theagenteconomy.si/listings/nevermined Category: Payment rails Status: live Open source: no Tags: http-402, metering, cards Last verified: 2026-10-16 Nevermined is a live listing under Payment rails. Payments facilitator that verifies and settles x402 and MPP charges against a payment plan, with metering and delegated card spending. The listing is not open source. Tags are http-402, metering, cards. Last verified 2026-10-16. Payments facilitator that verifies and settles x402 and MPP charges against a payment plan, with metering and delegated card spending. Sources: - Nevermined payments facilitator: https://nevermined.ai/docs/products/payments-facilitator/overview ## Olas Mech Marketplace URL: https://theagenteconomy.si/listings/olas-mech-marketplace Category: Exchanges and markets Status: live Open source: yes Tags: agents, services, marketplace Last verified: 2026-10-16 Olas Mech Marketplace is a live listing under Exchanges and markets. Marketplace where an agent can hire a specialized agent for a task and pay in crypto, or list its own service for other agents to hire. The listing is open source. Marketplace where an agent can hire a specialized agent for a task and pay in crypto, or list its own service for other agents to hire. Sources: - Olas Mech Marketplace: https://olas.network/mech-marketplace - Olas launch note for the Mech Marketplace: https://olas.network/blog/olas-launches-the-mech-marketplace-the-ai-agent-bazaar ## Open Policy Agent URL: https://theagenteconomy.si/listings/open-policy-agent Category: Governance and mandates Status: live Open source: yes Tags: policy, mandates, rego Last verified: 2026-10-16 Open Policy Agent is a live listing under Governance and mandates. Open source policy engine. An application sends structured input and OPA returns a decision from Rego policy, separate from the code that enforces it. The listing is open source. Open source policy engine. An application sends structured input and OPA returns a decision from Rego policy, separate from the code that enforces it. Sources: - Open Policy Agent documentation: https://www.openpolicyagent.org/docs ## OpenAI Agents SDK URL: https://theagenteconomy.si/listings/openai-agents-sdk Category: Frameworks and runtimes Status: live Open source: yes Tags: orchestration, tools, approvals Last verified: 2026-10-16 OpenAI Agents SDK is a live listing under Frameworks and runtimes. Library that runs an agent loop in your application, with tools, handoffs, guardrails, sessions, and human approval before a tool runs. The listing is open source. Tags are orchestration, tools, approvals. Library that runs an agent loop in your application, with tools, handoffs, guardrails, sessions, and human approval before a tool runs. Sources: - OpenAI Agents SDK guide: https://developers.openai.com/api/docs/guides/agents/sdk - OpenAI guardrails and human review: https://developers.openai.com/api/docs/guides/agents/guardrails-approvals ## PACT URL: https://theagenteconomy.si/listings/pact Category: Protocols Status: beta Open source: yes Tags: consent, identity, a2a Last verified: 2026-10-16 PACT is a beta listing under Protocols. Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. The listing is open source. Tags are consent, identity, a2a. Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. Sources: - PACT protocol overview: https://openpactprotocol.org/ - Decagon introduction of PACT: https://decagon.ai/blog/introducing-the-personal-agent-consent-trust-protocol-pact ## Personal Agent Protocol URL: https://theagenteconomy.si/listings/personal-agent-protocol Category: Protocols Status: designed Open source: yes Tags: consent, oauth, discovery Last verified: 2026-10-16 Personal Agent Protocol is a designed listing under Protocols. Draft protocol for a company to publish how a personal agent may sign in and act on a person's account, using OAuth, OpenAPI, and MCP. The listing is open source. Tags are consent, oauth, discovery. Draft protocol for a company to publish how a personal agent may sign in and act on a person's account, using OAuth, OpenAPI, and MCP. Sources: - Personal Agent Protocol overview: https://personalagentprotocol.org/docs/introduction - Personal Agent Protocol draft specification: https://personalagentprotocol.org/docs/0.2/spec ## Polygon Agent CLI URL: https://theagenteconomy.si/listings/polygon-agent-cli Category: Payment rails Status: live Open source: yes Tags: wallets, spend-limits, http-402 Last verified: 2026-10-19 Polygon Agent CLI is a live listing under Payment rails. Agent CLI with an embedded smart wallet. Session mode spends only inside an allowance the owner approves, x402 payments can be capped per call, and session logout revokes that install. The listing is open source. Agent CLI with an embedded smart wallet. Session mode spends only inside an allowance the owner approves, x402 payments can be capped per call, and session logout revokes that install. Sources: - Polygon Agent CLI reference: https://agentconnect.polygon.technology/references/cli-reference.md - Polygon Agent CLI package: https://www.npmjs.com/package/@polygonlabs/agent-cli ## Pydantic AI URL: https://theagenteconomy.si/listings/pydantic-ai Category: Frameworks and runtimes Status: live Open source: yes Tags: python, orchestration, guardrails Last verified: 2026-10-16 Pydantic AI is a live listing under Frameworks and runtimes. Typed Python agent SDK with structured outputs, guardrails, and companion packages for graph control flow and spending limits. The listing is open source. Tags are python, orchestration, guardrails. Last verified 2026-10-16. Typed Python agent SDK with structured outputs, guardrails, and companion packages for graph control flow and spending limits. Sources: - Pydantic AI overview: https://pydantic.dev/docs/ai/overview/ ## Render Network URL: https://theagenteconomy.si/listings/render-network Category: Exchanges and markets Status: live Open source: no Tags: gpu, capacity, marketplace Last verified: 2026-10-16 Render Network is a live listing under Exchanges and markets. Peer to peer marketplace that matches GPU supply with demand for rendering and machine learning jobs. The listing is not open source. Tags are gpu, capacity, marketplace. Last verified 2026-10-16. Peer to peer marketplace that matches GPU supply with demand for rendering and machine learning jobs. Sources: - Render Network node operators page: https://rendernetwork.com/participate-node-operators ## Skyfire URL: https://theagenteconomy.si/listings/skyfire Category: Payment rails Status: live Open source: no Tags: wallets, identity, kya Last verified: 2026-10-16 Skyfire is a live listing under Payment rails. Issues signed KYAPay tokens that bind an agent identity to a payment the buyer has committed, which the seller charges after delivery. The listing is not open source. Tags are wallets, identity, kya. Issues signed KYAPay tokens that bind an agent identity to a payment the buyer has committed, which the seller charges after delivery. Sources: - Skyfire KYAPay token documentation: https://docs.skyfire.xyz/docs/kyapay-tokens - Skyfire payments and settlement: https://docs.skyfire.xyz/docs/payments-settlement ## smolagents URL: https://theagenteconomy.si/listings/smolagents Category: Frameworks and runtimes Status: live Open source: yes Tags: python, tools, code-agents Last verified: 2026-10-16 smolagents is a live listing under Frameworks and runtimes. Open source Python library whose code agents write actions as code, with an option to run that code in a sandbox. The listing is open source. Tags are python, tools, code-agents. Open source Python library whose code agents write actions as code, with an option to run that code in a sandbox. Sources: - smolagents documentation: https://huggingface.co/docs/smolagents/index ## Strands Agents URL: https://theagenteconomy.si/listings/strands-agents Category: Frameworks and runtimes Status: live Open source: yes Tags: orchestration, guardrails, tools Last verified: 2026-10-19 Strands Agents is a live listing under Frameworks and runtimes. Open source SDK for a model driven agent loop in Python and TypeScript, with hooks, execution limits, and guardrails around each step. The listing is open source. Tags are orchestration, guardrails, tools. Open source SDK for a model driven agent loop in Python and TypeScript, with hooks, execution limits, and guardrails around each step. Sources: - Strands Agents documentation: https://strands-agents.github.io/docs/ - AWS prescriptive guidance for Strands Agents: https://docs.aws.amazon.com/prescriptive-guidance/latest/agentic-ai-frameworks/strands-agents.html ## Stripe link-cli URL: https://theagenteconomy.si/listings/stripe-link-cli Category: Payment rails Status: live Open source: yes Tags: cards, spend-limits, http-402 Last verified: 2026-10-19 Stripe link-cli is a live listing under Payment rails. CLI for an agent to request a card purchase or a Machine Payments Protocol charge. Link asks the customer to approve the spend request, then returns a one time payment credential. The listing is open source. CLI for an agent to request a card purchase or a Machine Payments Protocol charge. Link asks the customer to approve the spend request, then returns a one time payment credential. Sources: - stripe/link-cli README: https://github.com/stripe/link-cli/blob/main/README.md - Enable agents to spend: https://docs.stripe.com/agentic-commerce/agents/link-agent-wallet/use-link-wallet-pay-online ## Sui Agentic Payments URL: https://theagenteconomy.si/listings/sui-agentic-payments Category: Payment rails Status: beta Open source: no Tags: http-402, spend-limits, stablecoins Last verified: 2026-10-19 Sui Agentic Payments is a beta listing under Payment rails. Testnet gateway where an agent pays per API call in USDC on Sui. The owner sets an onchain grant with allowed services, a total budget, a per payment cap, and an expiry, and can revoke it. The listing is not open source. Testnet gateway where an agent pays per API call in USDC on Sui. The owner sets an onchain grant with allowed services, a total budget, a per payment cap, and an expiry, and can revoke it. Sources: - Sui Agent Payments: https://www.sui.io/agentpayments ## Tempo Wallet URL: https://theagenteconomy.si/listings/tempo-wallet Category: Payment rails Status: live Open source: no Tags: wallets, http-402, spend-limits Last verified: 2026-10-19 Tempo Wallet is a live listing under Payment rails. Wallet and CLI that let an agent discover paid services, preview MPP terms, and pay under a max spend cap. The listing is not open source. Tags are wallets, http-402, spend-limits. Wallet and CLI that let an agent discover paid services, preview MPP terms, and pay under a max spend cap. Sources: - Tempo Wallet agent documentation: https://tempo.xyz/developers/docs/wallet/recipes - Tempo guide to paying with the CLI: https://tempo.xyz/developers/docs/guide/machine-payments/agent ## Universal Commerce Protocol URL: https://theagenteconomy.si/listings/ucp Category: Protocols Status: live Open source: yes Tags: commerce, checkout, discovery Last verified: 2026-10-16 Universal Commerce Protocol is a live listing under Protocols. Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A. The listing is open source. Tags are commerce, checkout, discovery. Last verified 2026-10-16. Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A. Sources: - Universal Commerce Protocol specification: https://ucp.dev/latest/specification/overview/ - Google Developers introduction of UCP: https://developers.googleblog.com/under-the-hood-universal-commerce-protocol-ucp/ ## Virtuals Protocol URL: https://theagenteconomy.si/listings/virtuals-protocol Category: Exchanges and markets Status: live Open source: no Tags: agents, services, marketplace Last verified: 2026-10-16 Virtuals Protocol is a live listing under Exchanges and markets. Agent commerce protocol where agents discover services, negotiate jobs, coordinate execution, and settle payments with each other. The listing is not open source. Tags are agents, services, marketplace. Last verified 2026-10-16. Agent commerce protocol where agents discover services, negotiate jobs, coordinate execution, and settle payments with each other. Sources: - Virtuals Protocol site: https://www.virtuals.io/ ## Visa Trusted Agent Protocol URL: https://theagenteconomy.si/listings/visa-trusted-agent-protocol Category: Identity and trust Status: live Open source: no Tags: http-signatures, merchants, cards, agent-verification Last verified: 2026-10-19 Visa Trusted Agent Protocol is a live listing under Identity and trust. Visa specification for merchants to verify an approved agent from an RFC 9421 HTTP message signature bound to the site and the action, with optional consumer and payment identifiers. Visa reports live agent purchases at European merchants through it and its Agent Directory. Visa specification for merchants to verify an approved agent from an RFC 9421 HTTP message signature bound to the site and the action, with optional consumer and payment identifiers. Visa reports live agent purchases at European merchants through it and its Agent Directory. Sources: - Visa Developer Center: getting started with Trusted Agent Protocol: https://developer.visa.com/docs/trusted-agent-protocol - Visa press release introducing Trusted Agent Protocol (Oct 14, 2025): https://corporate.visa.com/en/sites/visa-perspectives/newsroom/visa-unveils-trusted-agent-protocol-for-ai-commerce.html - Visa press release on live agentic transactions in Europe (Jul 2, 2026): https://www.visa.co.uk/about-visa/newsroom/press-releases.3457328.html - Trusted Agent Protocol reference code on GitHub (Visa terms, not an open source license): https://github.com/visa/trusted-agent-protocol ## Web Bot Auth URL: https://theagenteconomy.si/listings/web-bot-auth Category: Identity and trust Status: beta Open source: yes Tags: http-signatures, bots, draft Last verified: 2026-10-19 Web Bot Auth is a beta listing under Identity and trust. Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are an IETF working group draft, not yet a standard. The listing is open source. Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are an IETF working group draft, not yet a standard. Sources: - Cloudflare Web Bot Auth documentation: https://developers.cloudflare.com/bots/reference/bot-verification/web-bot-auth/ - Google guide to Web Bot Auth: https://developers.google.com/crawling/docs/crawlers-fetchers/web-bot-auth - IETF webbotauth working group draft: HTTP Message Signatures for automated traffic: https://datatracker.ietf.org/doc/draft-ietf-webbotauth-httpsig-protocol/ ## x402 URL: https://theagenteconomy.si/listings/x402 Category: Payment rails Status: live Open source: yes Tags: http-402, stablecoins, pay-per-call Last verified: 2026-10-16 x402 is a live listing under Payment rails. Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment. The listing is open source. Tags are http-402, stablecoins, pay-per-call. Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment. Sources: - x402 site: https://x402.org/ - Coinbase documentation for how x402 works: https://docs.cdp.coinbase.com/x402/how-it-works # Comparisons ## Agent spend controls compared URL: https://theagenteconomy.si/compare/spend-controls Last verified: 2026-10-19 This page lists spend controls that vendor documents state for agent use. A filled cell links the document that was checked. If that document does not state the control, the cell says UNKNOWN. Last verified 2026-10-19. There are 14 UNKNOWN cells out of 63. ## A2A vs AGNTCY URL: https://theagenteconomy.si/compare/a2a-vs-agntcy Category: Protocols A2A and AGNTCY are Protocols listings set side by side. A2A is live. AGNTCY is live. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. A2A: Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. Status: live. Last verified: 2026-10-16. AGNTCY: Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. Status: live. Last verified: 2026-10-16. Sources: - A2A: Linux Foundation launch of the Agent2Agent Protocol project: https://www.linuxfoundation.org/press/linux-foundation-launches-the-agent2agent-protocol-project-to-enable-secure-intelligent-communication-between-ai-agents - A2A: A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ - AGNTCY: AGNTCY project site: https://agntcy.org/ - AGNTCY: Linux Foundation welcome of the AGNTCY project: https://www.linuxfoundation.org/press/linux-foundation-welcomes-the-agntcy-project-to-standardize-open-multi-agent-system-infrastructure-and-break-down-ai-agent-silos ## A2A vs Agent Network Protocol URL: https://theagenteconomy.si/compare/a2a-vs-anp Category: Protocols A2A and Agent Network Protocol are Protocols listings set side by side. A2A is live. Agent Network Protocol is beta. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. A2A: Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. Status: live. Last verified: 2026-10-16. Agent Network Protocol: Protocol suite whose 1.2 release covers agent identity, naming, description, and discovery, with DID authentication for did:wba and did:web. Authorization and payment specs are still drafts, and group end to end encryption is a candidate. Status: beta. Last verified: 2026-10-19. Sources: - A2A: Linux Foundation launch of the Agent2Agent Protocol project: https://www.linuxfoundation.org/press/linux-foundation-launches-the-agent2agent-protocol-project-to-enable-secure-intelligent-communication-between-ai-agents - A2A: A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ - Agent Network Protocol: ANP specification index: https://github.com/agent-network-protocol/AgentNetworkProtocol/blob/HEAD/README.md ## A2A vs Model Context Protocol URL: https://theagenteconomy.si/compare/a2a-vs-mcp Category: Protocols A2A and Model Context Protocol are Protocols listings set side by side. A2A is live. Model Context Protocol is live. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. A2A: Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC. Status: live. Last verified: 2026-10-16. Model Context Protocol: Open protocol that connects LLM applications to external tools, resources, and prompts through a standard request interface. Status: live. Last verified: 2026-10-16. Sources: - A2A: Linux Foundation launch of the Agent2Agent Protocol project: https://www.linuxfoundation.org/press/linux-foundation-launches-the-agent2agent-protocol-project-to-enable-secure-intelligent-communication-between-ai-agents - A2A: A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ - Model Context Protocol: Model Context Protocol specification: https://modelcontextprotocol.io/specification/2026-07-28 ## Agentic Commerce Protocol vs Universal Commerce Protocol URL: https://theagenteconomy.si/compare/agentic-commerce-protocol-vs-ucp Category: Protocols Agentic Commerce Protocol and Universal Commerce Protocol are Protocols listings set side by side. Agentic Commerce Protocol is live. Universal Commerce Protocol is live. Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. Agentic Commerce Protocol: Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. Status: live. Last verified: 2026-10-16. Universal Commerce Protocol: Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A. Status: live. Last verified: 2026-10-16. Sources: - Agentic Commerce Protocol: Stripe documentation for the Agentic Commerce Protocol: https://docs.stripe.com/agentic-commerce/protocols/acp - Agentic Commerce Protocol: Agentic Commerce Protocol getting started: https://agentic-commerce-protocol.com/docs/commerce/guides/get-started - Universal Commerce Protocol: Universal Commerce Protocol specification: https://ucp.dev/latest/specification/overview/ - Universal Commerce Protocol: Google Developers introduction of UCP: https://developers.googleblog.com/under-the-hood-universal-commerce-protocol-ucp/ ## Akash Network vs Gensyn URL: https://theagenteconomy.si/compare/akash-network-vs-gensyn Category: Exchanges and markets Akash Network and Gensyn are Exchanges and markets listings set side by side. Akash Network is live. Gensyn is live. Decentralized compute marketplace where independent providers bid to host workloads. Open infrastructure where humans and machines trade compute, data, and information in on-chain markets, with a peer-to-peer layer that carries MCP and A2A. Akash Network: Decentralized compute marketplace where independent providers bid to host workloads. Status: live. Last verified: 2026-10-16. Gensyn: Open infrastructure where humans and machines trade compute, data, and information in on-chain markets, with a peer-to-peer layer that carries MCP and A2A. Status: live. Last verified: 2026-10-16. Sources: - Akash Network: Akash Network introduction: https://akash.network/docs/getting-started/what-is-akash/ - Gensyn: Gensyn network documentation: https://docs.gensyn.network/ ## Akash Network vs Render Network URL: https://theagenteconomy.si/compare/akash-network-vs-render-network Category: Exchanges and markets Akash Network and Render Network are Exchanges and markets listings set side by side. Akash Network is live. Render Network is live. Decentralized compute marketplace where independent providers bid to host workloads. Peer to peer marketplace that matches GPU supply with demand for rendering and machine learning jobs. Akash Network: Decentralized compute marketplace where independent providers bid to host workloads. Status: live. Last verified: 2026-10-16. Render Network: Peer to peer marketplace that matches GPU supply with demand for rendering and machine learning jobs. Status: live. Last verified: 2026-10-16. Sources: - Akash Network: Akash Network introduction: https://akash.network/docs/getting-started/what-is-akash/ - Render Network: Render Network node operators page: https://rendernetwork.com/participate-node-operators ## AP2 vs Machine Payments Protocol URL: https://theagenteconomy.si/compare/ap2-vs-mpp Category: Payment rails AP2 and Machine Payments Protocol are Payment rails listings set side by side. AP2 is beta. Machine Payments Protocol is live. Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. AP2: Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. Status: beta. Last verified: 2026-10-19. Machine Payments Protocol: Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. Status: live. Last verified: 2026-10-16. Sources: - AP2: AP2 protocol documentation: https://ap2-protocol.org/ - AP2: Google Cloud announcement of AP2: https://cloud.google.com/blog/products/ai-machine-learning/announcing-agents-to-payments-ap2-protocol - AP2: AP2 v0.2.0 release on GitHub: https://github.com/google-agentic-commerce/AP2/releases/tag/v0.2.0 - Machine Payments Protocol: MPP protocol site: https://mpp.dev/ - Machine Payments Protocol: Stripe documentation for MPP: https://docs.stripe.com/payments/machine/mpp ## Claude Agent SDK vs OpenAI Agents SDK URL: https://theagenteconomy.si/compare/claude-agent-sdk-vs-openai-agents-sdk Category: Frameworks and runtimes Claude Agent SDK and OpenAI Agents SDK are Frameworks and runtimes listings set side by side. Claude Agent SDK is live. OpenAI Agents SDK is live. Library that runs the Claude Code agent loop in a process you operate, with built in tools, permissions, sessions, hooks, and subagents. Claude Agent SDK: Library that runs the Claude Code agent loop in a process you operate, with built in tools, permissions, sessions, hooks, and subagents. Status: live. Last verified: 2026-10-16. OpenAI Agents SDK: Library that runs an agent loop in your application, with tools, handoffs, guardrails, sessions, and human approval before a tool runs. Status: live. Last verified: 2026-10-16. Sources: - Claude Agent SDK: Claude Agent SDK overview: https://code.claude.com/docs/en/agent-sdk/overview - OpenAI Agents SDK: OpenAI Agents SDK guide: https://developers.openai.com/api/docs/guides/agents/sdk - OpenAI Agents SDK: OpenAI guardrails and human review: https://developers.openai.com/api/docs/guides/agents/guardrails-approvals ## CrewAI vs LangGraph URL: https://theagenteconomy.si/compare/crewai-vs-langgraph Category: Frameworks and runtimes CrewAI and LangGraph are Frameworks and runtimes listings set side by side. CrewAI is live. LangGraph is live. Open source framework that pairs event driven Flows for control flow with Crews of role based agents that collaborate on a delegated task. CrewAI: Open source framework that pairs event driven Flows for control flow with Crews of role based agents that collaborate on a delegated task. Status: live. Last verified: 2026-10-16. LangGraph: Low level orchestration runtime for long running stateful agents, with durable execution and human checkpoints inside the graph. Status: live. Last verified: 2026-10-16. Sources: - CrewAI: CrewAI introduction: https://docs.crewai.com/v1.15.28/en/introduction - LangGraph: LangGraph overview: https://docs.langchain.com/oss/python/langgraph/overview ## Microsoft Entra Agent ID vs ERC-8004 URL: https://theagenteconomy.si/compare/entra-agent-id-vs-erc-8004 Category: Identity and trust Microsoft Entra Agent ID and ERC-8004 are Identity and trust listings set side by side. Microsoft Entra Agent ID is live. ERC-8004 is designed. Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. Microsoft Entra Agent ID: Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. Status: live. Last verified: 2026-10-16. ERC-8004: Draft Ethereum proposal for three registries: an ERC-721 identity that points at an agent registration file, a reputation registry, and a validation registry. Status: designed. Last verified: 2026-10-16. Sources: - Microsoft Entra Agent ID: What is Microsoft Entra Agent ID: https://learn.microsoft.com/en-us/entra/agent-id/what-is-microsoft-entra-agent-id - Microsoft Entra Agent ID: Overview of agent identities in Microsoft Entra: https://learn.microsoft.com/en-us/entra/agent-id/agent-identities - ERC-8004: ERC-8004 Trustless Agents: https://eips.ethereum.org/EIPS/eip-8004 - ERC-8004: ERC-8004 reference contracts: https://github.com/erc-8004/erc-8004-contracts ## Microsoft Entra Agent ID vs Web Bot Auth URL: https://theagenteconomy.si/compare/entra-agent-id-vs-web-bot-auth Category: Identity and trust Microsoft Entra Agent ID and Web Bot Auth are Identity and trust listings set side by side. Microsoft Entra Agent ID is live. Web Bot Auth is beta. Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. Microsoft Entra Agent ID: Identity platform that creates agent identities from blueprints and applies Entra access policy, risk checks, and audit logs to them. Status: live. Last verified: 2026-10-16. Web Bot Auth: Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are an IETF working group draft, not yet a standard. Status: beta. Last verified: 2026-10-19. Sources: - Microsoft Entra Agent ID: What is Microsoft Entra Agent ID: https://learn.microsoft.com/en-us/entra/agent-id/what-is-microsoft-entra-agent-id - Microsoft Entra Agent ID: Overview of agent identities in Microsoft Entra: https://learn.microsoft.com/en-us/entra/agent-id/agent-identities - Web Bot Auth: Cloudflare Web Bot Auth documentation: https://developers.cloudflare.com/bots/reference/bot-verification/web-bot-auth/ - Web Bot Auth: Google guide to Web Bot Auth: https://developers.google.com/crawling/docs/crawlers-fetchers/web-bot-auth - Web Bot Auth: IETF webbotauth working group draft: HTTP Message Signatures for automated traffic: https://datatracker.ietf.org/doc/draft-ietf-webbotauth-httpsig-protocol/ ## Google ADK vs Microsoft Agent Framework URL: https://theagenteconomy.si/compare/google-adk-vs-microsoft-agent-framework Category: Frameworks and runtimes Google ADK and Microsoft Agent Framework are Frameworks and runtimes listings set side by side. Google ADK is live. Microsoft Agent Framework is live. Open source framework for building, debugging, and deploying agents, including graph workflows and multi agent orchestration. Google ADK: Open source framework for building, debugging, and deploying agents, including graph workflows and multi agent orchestration. Status: live. Last verified: 2026-10-16. Microsoft Agent Framework: Open framework for building and orchestrating agents and multi agent workflows in Python and .NET, with graph workflows and human checkpoints. Status: live. Last verified: 2026-10-16. Sources: - Google ADK: Agent Development Kit documentation: https://adk.dev/ - Microsoft Agent Framework: Microsoft Agent Framework repository: https://github.com/microsoft/agent-framework/ ## Guardrails AI vs NeMo Guardrails URL: https://theagenteconomy.si/compare/guardrails-ai-vs-nemo-guardrails Category: Governance and mandates Guardrails AI and NeMo Guardrails are Governance and mandates listings set side by side. Guardrails AI is live. NeMo Guardrails is live. Python framework that runs input and output guards to detect and mitigate specific risks, and can also extract structured data from model output. Guardrails AI: Python framework that runs input and output guards to detect and mitigate specific risks, and can also extract structured data from model output. Status: live. Last verified: 2026-10-16. NeMo Guardrails: Open source toolkit for programmable rails that block, alter, or validate user inputs, model responses, and tool calls. Status: live. Last verified: 2026-10-16. Sources: - Guardrails AI: Guardrails repository: https://github.com/guardrails-ai/guardrails - NeMo Guardrails: NVIDIA NeMo Guardrails overview: https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview ## Invariant vs Open Policy Agent URL: https://theagenteconomy.si/compare/invariant-vs-open-policy-agent Category: Governance and mandates Invariant and Open Policy Agent are Governance and mandates listings set side by side. Invariant is live. Open Policy Agent is live. Contextual security layer that checks an agent trace against declarative rules for tool calls, data flow, secrets, and looping. Invariant: Contextual security layer that checks an agent trace against declarative rules for tool calls, data flow, secrets, and looping. Status: live. Last verified: 2026-10-16. Open Policy Agent: Open source policy engine. An application sends structured input and OPA returns a decision from Rego policy, separate from the code that enforces it. Status: live. Last verified: 2026-10-16. Sources: - Invariant: Invariant Labs product page: https://invariantlabs.ai/docs - Invariant: Invariant guardrails rule reference: https://invariantlabs-ai.github.io/docs/mcp-scan/guardrails-reference/ - Open Policy Agent: Open Policy Agent documentation: https://www.openpolicyagent.org/docs ## L402 vs x402 URL: https://theagenteconomy.si/compare/l402-vs-x402 Category: Payment rails L402 and x402 are Payment rails listings set side by side. L402 is live. x402 is live. HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. L402: HTTP 402 flow that pairs a macaroon with a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. Status: live. Last verified: 2026-10-16. x402: Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment. Status: live. Last verified: 2026-10-16. Sources: - L402: Lightning Labs L402 documentation: https://docs.lightning.engineering/the-lightning-network/l402 - x402: x402 site: https://x402.org/ - x402: Coinbase documentation for how x402 works: https://docs.cdp.coinbase.com/x402/how-it-works ## Machine Payments Protocol vs x402 URL: https://theagenteconomy.si/compare/mpp-vs-x402 Category: Payment rails Machine Payments Protocol and x402 are Payment rails listings set side by side. Machine Payments Protocol is live. x402 is live. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. Machine Payments Protocol: Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. Status: live. Last verified: 2026-10-16. x402: Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment. Status: live. Last verified: 2026-10-16. Sources: - Machine Payments Protocol: MPP protocol site: https://mpp.dev/ - Machine Payments Protocol: Stripe documentation for MPP: https://docs.stripe.com/payments/machine/mpp - x402: x402 site: https://x402.org/ - x402: Coinbase documentation for how x402 works: https://docs.cdp.coinbase.com/x402/how-it-works ## Olas Mech Marketplace vs Virtuals Protocol URL: https://theagenteconomy.si/compare/olas-mech-marketplace-vs-virtuals-protocol Category: Exchanges and markets Olas Mech Marketplace and Virtuals Protocol are Exchanges and markets listings set side by side. Olas Mech Marketplace is live. Virtuals Protocol is live. Marketplace where an agent can hire a specialized agent for a task and pay in crypto, or list its own service for other agents to hire. Olas Mech Marketplace: Marketplace where an agent can hire a specialized agent for a task and pay in crypto, or list its own service for other agents to hire. Status: live. Last verified: 2026-10-16. Virtuals Protocol: Agent commerce protocol where agents discover services, negotiate jobs, coordinate execution, and settle payments with each other. Status: live. Last verified: 2026-10-16. Sources: - Olas Mech Marketplace: Olas Mech Marketplace: https://olas.network/mech-marketplace - Olas Mech Marketplace: Olas launch note for the Mech Marketplace: https://olas.network/blog/olas-launches-the-mech-marketplace-the-ai-agent-bazaar - Virtuals Protocol: Virtuals Protocol site: https://www.virtuals.io/ ## PACT vs Personal Agent Protocol URL: https://theagenteconomy.si/compare/pact-vs-personal-agent-protocol Category: Protocols PACT and Personal Agent Protocol are Protocols listings set side by side. PACT is beta. Personal Agent Protocol is designed. Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. PACT: Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. Status: beta. Last verified: 2026-10-16. Personal Agent Protocol: Draft protocol for a company to publish how a personal agent may sign in and act on a person's account, using OAuth, OpenAPI, and MCP. Status: designed. Last verified: 2026-10-16. Sources: - PACT: PACT protocol overview: https://openpactprotocol.org/ - PACT: Decagon introduction of PACT: https://decagon.ai/blog/introducing-the-personal-agent-consent-trust-protocol-pact - Personal Agent Protocol: Personal Agent Protocol overview: https://personalagentprotocol.org/docs/introduction - Personal Agent Protocol: Personal Agent Protocol draft specification: https://personalagentprotocol.org/docs/0.2/spec ## Pydantic AI vs smolagents URL: https://theagenteconomy.si/compare/pydantic-ai-vs-smolagents Category: Frameworks and runtimes Pydantic AI and smolagents are Frameworks and runtimes listings set side by side. Pydantic AI is live. smolagents is live. Typed Python agent SDK with structured outputs, guardrails, and companion packages for graph control flow and spending limits. Open source Python library whose code agents write actions as code, with an option to run that code in a sandbox. Pydantic AI: Typed Python agent SDK with structured outputs, guardrails, and companion packages for graph control flow and spending limits. Status: live. Last verified: 2026-10-16. smolagents: Open source Python library whose code agents write actions as code, with an option to run that code in a sandbox. Status: live. Last verified: 2026-10-16. Sources: - Pydantic AI: Pydantic AI overview: https://pydantic.dev/docs/ai/overview/ - smolagents: smolagents documentation: https://huggingface.co/docs/smolagents/index ## Skyfire vs Tempo Wallet URL: https://theagenteconomy.si/compare/skyfire-vs-tempo-wallet Category: Payment rails Skyfire and Tempo Wallet are Payment rails listings set side by side. Skyfire is live. Tempo Wallet is live. Issues signed KYAPay tokens that bind an agent identity to a payment the buyer has committed, which the seller charges after delivery. Skyfire: Issues signed KYAPay tokens that bind an agent identity to a payment the buyer has committed, which the seller charges after delivery. Status: live. Last verified: 2026-10-16. Tempo Wallet: Wallet and CLI that let an agent discover paid services, preview MPP terms, and pay under a max spend cap. Status: live. Last verified: 2026-10-19. Sources: - Skyfire: Skyfire KYAPay token documentation: https://docs.skyfire.xyz/docs/kyapay-tokens - Skyfire: Skyfire payments and settlement: https://docs.skyfire.xyz/docs/payments-settlement - Tempo Wallet: Tempo Wallet agent documentation: https://tempo.xyz/developers/docs/wallet/recipes - Tempo Wallet: Tempo guide to paying with the CLI: https://tempo.xyz/developers/docs/guide/machine-payments/agent ## Visa Trusted Agent Protocol vs Web Bot Auth URL: https://theagenteconomy.si/compare/visa-trusted-agent-protocol-vs-web-bot-auth Category: Identity and trust Visa Trusted Agent Protocol and Web Bot Auth are Identity and trust listings set side by side. Visa Trusted Agent Protocol is live. Web Bot Auth is beta. Last verified 2026-10-19 and 2026-10-19. Shared tags are http-signatures. The table cites each listing's sources. Visa Trusted Agent Protocol: Visa specification for merchants to verify an approved agent from an RFC 9421 HTTP message signature bound to the site and the action, with optional consumer and payment identifiers. Visa reports live agent purchases at European merchants through it and its Agent Directory. Status: live. Last verified: 2026-10-19. Web Bot Auth: Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are an IETF working group draft, not yet a standard. Status: beta. Last verified: 2026-10-19. Sources: - Visa Trusted Agent Protocol: Visa Developer Center: getting started with Trusted Agent Protocol: https://developer.visa.com/docs/trusted-agent-protocol - Visa Trusted Agent Protocol: Visa press release introducing Trusted Agent Protocol (Oct 14, 2025): https://corporate.visa.com/en/sites/visa-perspectives/newsroom/visa-unveils-trusted-agent-protocol-for-ai-commerce.html - Visa Trusted Agent Protocol: Visa press release on live agentic transactions in Europe (Jul 2, 2026): https://www.visa.co.uk/about-visa/newsroom/press-releases.3457328.html - Visa Trusted Agent Protocol: Trusted Agent Protocol reference code on GitHub (Visa terms, not an open source license): https://github.com/visa/trusted-agent-protocol - Web Bot Auth: Cloudflare Web Bot Auth documentation: https://developers.cloudflare.com/bots/reference/bot-verification/web-bot-auth/ - Web Bot Auth: Google guide to Web Bot Auth: https://developers.google.com/crawling/docs/crawlers-fetchers/web-bot-auth - Web Bot Auth: IETF webbotauth working group draft: HTTP Message Signatures for automated traffic: https://datatracker.ietf.org/doc/draft-ietf-webbotauth-httpsig-protocol/ # Filters ## Agent governance and mandates URL: https://theagenteconomy.si/best/agent-governance Agent governance and mandates lists 6 Governance and mandates entries in alphabetical order. Every governance and mandate listing, listed alphabetically by name. Nothing on the page is scored. The names are Guardrails AI, Invariant, Lakera Guard, LiteLLM Proxy, NeMo Guardrails, Open Policy Agent. Every governance and mandate listing, listed alphabetically by name. Nothing on the page is scored. Listings: - Guardrails AI (live, last verified 2026-10-16): https://theagenteconomy.si/listings/guardrails-ai - Invariant (live, last verified 2026-10-16): https://theagenteconomy.si/listings/invariant - Lakera Guard (live, last verified 2026-10-16): https://theagenteconomy.si/listings/lakera-guard - LiteLLM Proxy (live, last verified 2026-10-16): https://theagenteconomy.si/listings/litellm - NeMo Guardrails (live, last verified 2026-10-16): https://theagenteconomy.si/listings/nemo-guardrails - Open Policy Agent (live, last verified 2026-10-16): https://theagenteconomy.si/listings/open-policy-agent ## Agent identity and trust URL: https://theagenteconomy.si/best/agent-identity Agent identity and trust lists 4 Identity and trust entries in alphabetical order. Every identity and trust listing, listed alphabetically by name. Nothing on the page is scored. The names are ERC-8004, Microsoft Entra Agent ID, Visa Trusted Agent Protocol, Web Bot Auth. Every identity and trust listing, listed alphabetically by name. Nothing on the page is scored. Listings: - ERC-8004 (designed, last verified 2026-10-16): https://theagenteconomy.si/listings/erc-8004 - Microsoft Entra Agent ID (live, last verified 2026-10-16): https://theagenteconomy.si/listings/entra-agent-id - Visa Trusted Agent Protocol (live, last verified 2026-10-19): https://theagenteconomy.si/listings/visa-trusted-agent-protocol - Web Bot Auth (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/web-bot-auth ## Agent payment rails URL: https://theagenteconomy.si/best/best-agent-payment-rails Agent payment rails lists 13 Payment rails entries in alphabetical order. Every payment rail in the directory, listed alphabetically by name. Nothing on the page is scored. The names are AP2, Coinbase Agentic Wallet, Hedera Agent Accounts, L402, Machine Payments Protocol, MetaMask Agent Wallet, Nevermined, Polygon Agent CLI, Skyfire, Stripe link-cli, Sui Agentic Payments, Tempo Wallet, x402. Every payment rail in the directory, listed alphabetically by name. Nothing on the page is scored. Listings: - AP2 (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/ap2 - Coinbase Agentic Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/coinbase-agentic-wallet - Hedera Agent Accounts (designed, last verified 2026-10-19): https://theagenteconomy.si/listings/hedera-agent-accounts - L402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/l402 - Machine Payments Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mpp - MetaMask Agent Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/metamask-agent-wallet - Nevermined (live, last verified 2026-10-16): https://theagenteconomy.si/listings/nevermined - Polygon Agent CLI (live, last verified 2026-10-19): https://theagenteconomy.si/listings/polygon-agent-cli - Skyfire (live, last verified 2026-10-16): https://theagenteconomy.si/listings/skyfire - Stripe link-cli (live, last verified 2026-10-19): https://theagenteconomy.si/listings/stripe-link-cli - Sui Agentic Payments (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/sui-agentic-payments - Tempo Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/tempo-wallet - x402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/x402 ## Agent protocols URL: https://theagenteconomy.si/best/agent-protocols Agent protocols lists 8 Protocols entries in alphabetical order. Every protocol in the directory, listed alphabetically by name. Nothing on the page is scored. The names are A2A, Agent Network Protocol, Agentic Commerce Protocol, AGNTCY, Model Context Protocol, PACT, Personal Agent Protocol, Universal Commerce Protocol. Every protocol in the directory, listed alphabetically by name. Nothing on the page is scored. Listings: - A2A (live, last verified 2026-10-16): https://theagenteconomy.si/listings/a2a - Agent Network Protocol (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/anp - Agentic Commerce Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/agentic-commerce-protocol - AGNTCY (live, last verified 2026-10-16): https://theagenteconomy.si/listings/agntcy - Model Context Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mcp - PACT (beta, last verified 2026-10-16): https://theagenteconomy.si/listings/pact - Personal Agent Protocol (designed, last verified 2026-10-16): https://theagenteconomy.si/listings/personal-agent-protocol - Universal Commerce Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/ucp ## Agent service marketplaces URL: https://theagenteconomy.si/best/agent-service-marketplaces Agent service marketplaces lists 2 Exchanges and markets entries in alphabetical order. Exchange listings tagged agents, listed alphabetically by name. Nothing on the page is scored. The names are Olas Mech Marketplace, Virtuals Protocol. Last verified 2026-10-16. Each row links the listing and its sources. Exchange listings tagged agents, listed alphabetically by name. Nothing on the page is scored. Listings: - Olas Mech Marketplace (live, last verified 2026-10-16): https://theagenteconomy.si/listings/olas-mech-marketplace - Virtuals Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/virtuals-protocol ## Compute marketplaces URL: https://theagenteconomy.si/best/compute-marketplaces Compute marketplaces lists 3 Exchanges and markets entries in alphabetical order. Exchange listings tagged compute, listed alphabetically by name. Nothing on the page is scored. The names are Akash Network, Bittensor, Gensyn. Last verified dates on these listings run from 2026-10-16 to 2026-10-19. Exchange listings tagged compute, listed alphabetically by name. Nothing on the page is scored. Listings: - Akash Network (live, last verified 2026-10-16): https://theagenteconomy.si/listings/akash-network - Bittensor (live, last verified 2026-10-19): https://theagenteconomy.si/listings/bittensor - Gensyn (live, last verified 2026-10-16): https://theagenteconomy.si/listings/gensyn ## HTTP 402 payment rails URL: https://theagenteconomy.si/best/http-402-payment-rails HTTP 402 payment rails lists 10 Payment rails entries in alphabetical order. Payment rails tagged http-402, listed alphabetically by name. Nothing on the page is scored. The names are Coinbase Agentic Wallet, L402, Machine Payments Protocol, MetaMask Agent Wallet, Nevermined, Polygon Agent CLI, Stripe link-cli, Sui Agentic Payments, Tempo Wallet, x402. Payment rails tagged http-402, listed alphabetically by name. Nothing on the page is scored. Listings: - Coinbase Agentic Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/coinbase-agentic-wallet - L402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/l402 - Machine Payments Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mpp - MetaMask Agent Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/metamask-agent-wallet - Nevermined (live, last verified 2026-10-16): https://theagenteconomy.si/listings/nevermined - Polygon Agent CLI (live, last verified 2026-10-19): https://theagenteconomy.si/listings/polygon-agent-cli - Stripe link-cli (live, last verified 2026-10-19): https://theagenteconomy.si/listings/stripe-link-cli - Sui Agentic Payments (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/sui-agentic-payments - Tempo Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/tempo-wallet - x402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/x402 ## Live agent payment rails URL: https://theagenteconomy.si/best/live-agent-payment-rails Live agent payment rails lists 10 Payment rails entries in alphabetical order. Payment rails with status live, listed alphabetically by name. Nothing on the page is scored. The names are Coinbase Agentic Wallet, L402, Machine Payments Protocol, MetaMask Agent Wallet, Nevermined, Polygon Agent CLI, Skyfire, Stripe link-cli, Tempo Wallet, x402. Payment rails with status live, listed alphabetically by name. Nothing on the page is scored. Listings: - Coinbase Agentic Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/coinbase-agentic-wallet - L402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/l402 - Machine Payments Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mpp - MetaMask Agent Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/metamask-agent-wallet - Nevermined (live, last verified 2026-10-16): https://theagenteconomy.si/listings/nevermined - Polygon Agent CLI (live, last verified 2026-10-19): https://theagenteconomy.si/listings/polygon-agent-cli - Skyfire (live, last verified 2026-10-16): https://theagenteconomy.si/listings/skyfire - Stripe link-cli (live, last verified 2026-10-19): https://theagenteconomy.si/listings/stripe-link-cli - Tempo Wallet (live, last verified 2026-10-19): https://theagenteconomy.si/listings/tempo-wallet - x402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/x402 ## Multi agent frameworks URL: https://theagenteconomy.si/best/multi-agent-frameworks Multi agent frameworks lists 3 Frameworks and runtimes entries in alphabetical order. Frameworks tagged multi-agent, listed alphabetically by name. Nothing on the page is scored. The names are CrewAI, Google ADK, Microsoft Agent Framework. Last verified 2026-10-16. Each row links the listing and its sources. Frameworks tagged multi-agent, listed alphabetically by name. Nothing on the page is scored. Listings: - CrewAI (live, last verified 2026-10-16): https://theagenteconomy.si/listings/crewai - Google ADK (live, last verified 2026-10-16): https://theagenteconomy.si/listings/google-adk - Microsoft Agent Framework (live, last verified 2026-10-16): https://theagenteconomy.si/listings/microsoft-agent-framework ## Open source agent frameworks URL: https://theagenteconomy.si/best/open-source-agent-frameworks Open source agent frameworks lists 9 Frameworks and runtimes entries in alphabetical order. Frameworks and runtimes marked open source, listed alphabetically by name. Nothing on the page is scored. The names are CrewAI, Google ADK, LangGraph, Mastra, Microsoft Agent Framework, OpenAI Agents SDK, Pydantic AI, smolagents, Strands Agents. Frameworks and runtimes marked open source, listed alphabetically by name. Nothing on the page is scored. Listings: - CrewAI (live, last verified 2026-10-16): https://theagenteconomy.si/listings/crewai - Google ADK (live, last verified 2026-10-16): https://theagenteconomy.si/listings/google-adk - LangGraph (live, last verified 2026-10-16): https://theagenteconomy.si/listings/langgraph - Mastra (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mastra - Microsoft Agent Framework (live, last verified 2026-10-16): https://theagenteconomy.si/listings/microsoft-agent-framework - OpenAI Agents SDK (live, last verified 2026-10-16): https://theagenteconomy.si/listings/openai-agents-sdk - Pydantic AI (live, last verified 2026-10-16): https://theagenteconomy.si/listings/pydantic-ai - smolagents (live, last verified 2026-10-16): https://theagenteconomy.si/listings/smolagents - Strands Agents (live, last verified 2026-10-19): https://theagenteconomy.si/listings/strands-agents ## Open source agent governance URL: https://theagenteconomy.si/best/open-source-governance Open source agent governance lists 4 Governance and mandates entries in alphabetical order. Governance listings marked open source, listed alphabetically by name. Nothing on the page is scored. The names are Guardrails AI, LiteLLM Proxy, NeMo Guardrails, Open Policy Agent. Governance listings marked open source, listed alphabetically by name. Nothing on the page is scored. Listings: - Guardrails AI (live, last verified 2026-10-16): https://theagenteconomy.si/listings/guardrails-ai - LiteLLM Proxy (live, last verified 2026-10-16): https://theagenteconomy.si/listings/litellm - NeMo Guardrails (live, last verified 2026-10-16): https://theagenteconomy.si/listings/nemo-guardrails - Open Policy Agent (live, last verified 2026-10-16): https://theagenteconomy.si/listings/open-policy-agent ## Open source payment rails URL: https://theagenteconomy.si/best/open-source-payment-rails Open source payment rails lists 6 Payment rails entries in alphabetical order. Payment rails marked open source, listed alphabetically by name. Nothing on the page is scored. The names are AP2, L402, Machine Payments Protocol, Polygon Agent CLI, Stripe link-cli, x402. Payment rails marked open source, listed alphabetically by name. Nothing on the page is scored. Listings: - AP2 (beta, last verified 2026-10-19): https://theagenteconomy.si/listings/ap2 - L402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/l402 - Machine Payments Protocol (live, last verified 2026-10-16): https://theagenteconomy.si/listings/mpp - Polygon Agent CLI (live, last verified 2026-10-19): https://theagenteconomy.si/listings/polygon-agent-cli - Stripe link-cli (live, last verified 2026-10-19): https://theagenteconomy.si/listings/stripe-link-cli - x402 (live, last verified 2026-10-16): https://theagenteconomy.si/listings/x402 # Glossary ## A2A URL: https://theagenteconomy.si/glossary/a2a Last verified: 2026-10-17 A2A is defined here as follows. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP. Requests and responses use JSON-RPC 2.0. The directory source for this term is A2A core concepts. Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP. Requests and responses use JSON-RPC 2.0. Source: A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ Listings: A2A, AP2, Gensyn, PACT, Universal Commerce Protocol ## Agent Card URL: https://theagenteconomy.si/glossary/agent-card Last verified: 2026-10-17 Agent Card is defined here as follows. JSON document in A2A that lists an agent's identity, capabilities, endpoint, skills, and authentication requirements so a client can decide how to call it. The directory source for this term is A2A core concepts. JSON document in A2A that lists an agent's identity, capabilities, endpoint, skills, and authentication requirements so a client can decide how to call it. Source: A2A core concepts: https://a2a-protocol.org/latest/topics/key-concepts/ Listings: A2A ## Agent identity URL: https://theagenteconomy.si/glossary/agent-identity Last verified: 2026-10-17 Agent identity is defined here as follows. An identity created for an agent so access policy, risk checks, and audit logs can apply to it. Microsoft Entra Agent ID creates these identities from blueprints. The directory source for this term is Overview of agent identities in Microsoft Entra. An identity created for an agent so access policy, risk checks, and audit logs can apply to it. Microsoft Entra Agent ID creates these identities from blueprints. Source: Overview of agent identities in Microsoft Entra: https://learn.microsoft.com/en-us/entra/agent-id/agent-identities Listings: Agent Network Protocol, AGNTCY, ERC-8004, Microsoft Entra Agent ID, Skyfire, Visa Trusted Agent Protocol ## Agent mandate URL: https://theagenteconomy.si/glossary/agent-mandate Last verified: 2026-10-17 Agent mandate is defined here as follows. Signed credential in AP2. A checkout mandate records the cart negotiated with the merchant. A payment mandate authorizes a payment instrument against that checkout. The directory source for this term is AP2 protocol documentation. Signed credential in AP2. A checkout mandate records the cart negotiated with the merchant. A payment mandate authorizes a payment instrument against that checkout. Source: AP2 protocol documentation: https://ap2-protocol.org/ Listings: AP2 ## Agent marketplace URL: https://theagenteconomy.si/glossary/agent-marketplace Last verified: 2026-10-17 Agent marketplace is defined here as follows. A market where an agent can hire a specialized agent for a task and pay for the work, or list its own service for other agents to hire. The directory source for this term is Olas Mech Marketplace. A market where an agent can hire a specialized agent for a task and pay for the work, or list its own service for other agents to hire. Source: Olas Mech Marketplace: https://olas.network/mech-marketplace Listings: Olas Mech Marketplace, Virtuals Protocol ## Agent wallet URL: https://theagenteconomy.si/glossary/agent-wallet Last verified: 2026-10-17 Agent wallet is defined here as follows. A wallet an agent can use to discover paid services and pay under a cap the operator set. Tempo Wallet lets an agent preview Machine Payments Protocol terms and pay under a max spend cap. The directory source for this term is Tempo Wallet agent documentation. A wallet an agent can use to discover paid services and pay under a cap the operator set. Tempo Wallet lets an agent preview Machine Payments Protocol terms and pay under a max spend cap. Source: Tempo Wallet agent documentation: https://tempo.xyz/developers/docs/wallet/recipes Listings: Coinbase Agentic Wallet, MetaMask Agent Wallet, Polygon Agent CLI, Tempo Wallet ## Agentic Commerce Protocol URL: https://theagenteconomy.si/glossary/agentic-commerce-protocol Last verified: 2026-10-17 Agentic Commerce Protocol is defined here as follows. Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. The directory source for this term is Stripe documentation for the Agentic Commerce Protocol. Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business. Source: Stripe documentation for the Agentic Commerce Protocol: https://docs.stripe.com/agentic-commerce/protocols/acp Listings: Agentic Commerce Protocol ## AGNTCY URL: https://theagenteconomy.si/glossary/agntcy Last verified: 2026-10-17 AGNTCY is defined here as follows. Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. The directory source for this term is AGNTCY project site. Last verified 2026-10-17. The directory lists 1 entries that use this term. Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability. Source: AGNTCY project site: https://agntcy.org/ Listings: AGNTCY ## AP2 URL: https://theagenteconomy.si/glossary/ap2 Last verified: 2026-10-17 AP2 is defined here as follows. Open payment extension for A2A and the Universal Commerce Protocol. It records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. The directory source for this term is AP2 protocol documentation. Open payment extension for A2A and the Universal Commerce Protocol. It records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. Source: AP2 protocol documentation: https://ap2-protocol.org/ Listings: AP2 ## Compute marketplace URL: https://theagenteconomy.si/glossary/compute-marketplace Last verified: 2026-10-17 Compute marketplace is defined here as follows. A market where independent providers offer compute for workloads. Akash Network documents providers bidding to host those workloads. The directory source for this term is Akash Network introduction. Last verified 2026-10-17. The directory lists 3 entries that use this term. A market where independent providers offer compute for workloads. Akash Network documents providers bidding to host those workloads. Source: Akash Network introduction: https://akash.network/docs/getting-started/what-is-akash/ Listings: Akash Network, Gensyn, Render Network ## Content-addressed proof URL: https://theagenteconomy.si/glossary/content-addressed-proof Last verified: 2026-10-19 Content-addressed proof is defined here as follows. A record identified by a hash of its bytes, so a reader can check that those bytes match the identifier. Merkle proofs show membership in a larger hashed set. IPFS content identifiers are a common form. Accords is one listing that uses this for a transaction record, not the only use. A record identified by a hash of its bytes, so a reader can check that those bytes match the identifier. Merkle proofs show membership in a larger hashed set. IPFS content identifiers are a common form. Accords is one listing that uses this for a transaction record, not the only use. Source: IPFS content identifiers: https://docs.ipfs.tech/concepts/content-addressing/ Source: IPFS Merkle directed acyclic graphs: https://docs.ipfs.tech/concepts/merkle-dag/ Listings: Accords ## Decentralized identifier URL: https://theagenteconomy.si/glossary/did Last verified: 2026-10-17 Decentralized identifier is defined here as follows. A URI that associates a subject with a DID document. The controller can prove control without permission from a centralized registry, identity provider, or certificate authority. The directory source for this term is W3C Decentralized Identifiers v1.0. A URI that associates a subject with a DID document. The controller can prove control without permission from a centralized registry, identity provider, or certificate authority. Source: W3C Decentralized Identifiers v1.0: https://www.w3.org/TR/did/ Listings: Agent Network Protocol ## Digital commodity URL: https://theagenteconomy.si/glossary/digital-commodity Last verified: 2026-10-17 Digital commodity is defined here as follows. Work product of an open network where independent subnets produce digital commodities and the chain pays contributors. The directory source for this term is Bittensor site. Last verified 2026-10-17. The directory lists 1 entries that use this term. Work product of an open network where independent subnets produce digital commodities and the chain pays contributors. Source: Bittensor site: https://www.bittensor.com/ Listings: Bittensor ## ERC-8004 URL: https://theagenteconomy.si/glossary/erc-8004 Last verified: 2026-10-17 ERC-8004 is defined here as follows. Draft Ethereum proposal for three registries: an ERC-721 identity that points at an agent registration file, a reputation registry, and a validation registry. The directory source for this term is ERC-8004 Trustless Agents. Last verified 2026-10-17. Draft Ethereum proposal for three registries: an ERC-721 identity that points at an agent registration file, a reputation registry, and a validation registry. Source: ERC-8004 Trustless Agents: https://eips.ethereum.org/EIPS/eip-8004 Listings: ERC-8004 ## Guardrail URL: https://theagenteconomy.si/glossary/guardrail Last verified: 2026-10-17 Guardrail is defined here as follows. Programmable check that can block, alter, or validate user input, model output, or a tool call. NeMo Guardrails runs these checks as rails around an LLM application. The directory source for this term is NVIDIA NeMo Guardrails overview. Programmable check that can block, alter, or validate user input, model output, or a tool call. NeMo Guardrails runs these checks as rails around an LLM application. Source: NVIDIA NeMo Guardrails overview: https://docs.nvidia.com/nemo/guardrails/about-nemo-guardrails-library/overview Listings: Guardrails AI, Invariant, Lakera Guard, LiteLLM Proxy, Mastra, NeMo Guardrails, OpenAI Agents SDK, Pydantic AI, Strands Agents ## HTTP 402 URL: https://theagenteconomy.si/glossary/http-402 Last verified: 2026-10-17 HTTP 402 is defined here as follows. HTTP status code 402, Payment Required. RFC 9110 reserves the code for future use. x402, L402, and the Machine Payments Protocol use a 402 response as the signal that the request needs payment. The directory source for this term is RFC 9110, status 402 Payment Required. HTTP status code 402, Payment Required. RFC 9110 reserves the code for future use. x402, L402, and the Machine Payments Protocol use a 402 response as the signal that the request needs payment. Source: RFC 9110, status 402 Payment Required: https://www.rfc-editor.org/rfc/rfc9110.html#section-15.5.3 Listings: L402, Machine Payments Protocol, MetaMask Agent Wallet, Nevermined, Polygon Agent CLI, Stripe link-cli, Sui Agentic Payments, Tempo Wallet, x402 ## Human approval URL: https://theagenteconomy.si/glossary/human-approval Last verified: 2026-10-17 Human approval is defined here as follows. A pause where a person inspects or changes agent state before the run continues. LangGraph provides this inside the graph. The directory source for this term is LangGraph overview. Last verified 2026-10-17. The directory lists 4 entries that use this term. A pause where a person inspects or changes agent state before the run continues. LangGraph provides this inside the graph. Source: LangGraph overview: https://docs.langchain.com/oss/python/langgraph/overview Listings: LangGraph, Mastra, Microsoft Agent Framework, OpenAI Agents SDK ## JSON-RPC URL: https://theagenteconomy.si/glossary/json-rpc Last verified: 2026-10-17 JSON-RPC is defined here as follows. Stateless remote procedure call protocol. A request is a JSON object naming a method, with optional parameters and an id, and the server returns a JSON result or error. The directory source for this term is JSON-RPC 2.0 specification. Stateless remote procedure call protocol. A request is a JSON object naming a method, with optional parameters and an id, and the server returns a JSON result or error. Source: JSON-RPC 2.0 specification: https://www.jsonrpc.org/specification Listings: A2A, Model Context Protocol ## KYAPay URL: https://theagenteconomy.si/glossary/kyapay Last verified: 2026-10-17 KYAPay is defined here as follows. Signed token from Skyfire that binds an agent identity to a payment the buyer has committed. The seller charges the token after delivery. The directory source for this term is Skyfire KYAPay token documentation. Signed token from Skyfire that binds an agent identity to a payment the buyer has committed. The seller charges the token after delivery. Source: Skyfire KYAPay token documentation: https://docs.skyfire.xyz/docs/kyapay-tokens Listings: Skyfire ## L402 URL: https://theagenteconomy.si/glossary/l402 Last verified: 2026-10-17 L402 is defined here as follows. HTTP 402 flow from Lightning Labs. The server returns a macaroon and a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. The directory source for this term is Lightning Labs L402 documentation. HTTP 402 flow from Lightning Labs. The server returns a macaroon and a Lightning invoice. The client pays, then presents the preimage so the server can check payment without a lookup. Source: Lightning Labs L402 documentation: https://docs.lightning.engineering/the-lightning-network/l402 Listings: L402 ## Machine Payments Protocol URL: https://theagenteconomy.si/glossary/machine-payments-protocol Last verified: 2026-10-17 Machine Payments Protocol is defined here as follows. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. The directory source for this term is Stripe documentation for MPP. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. Source: Stripe documentation for MPP: https://docs.stripe.com/payments/machine/mpp Listings: Machine Payments Protocol, Nevermined, Tempo Wallet ## Model Context Protocol URL: https://theagenteconomy.si/glossary/mcp Last verified: 2026-10-17 Model Context Protocol is defined here as follows. Open protocol that connects an LLM application to external tools, resources, and prompts. Hosts, clients, and servers exchange JSON-RPC 2.0 messages. The directory source for this term is Model Context Protocol specification. Open protocol that connects an LLM application to external tools, resources, and prompts. Hosts, clients, and servers exchange JSON-RPC 2.0 messages. Source: Model Context Protocol specification: https://modelcontextprotocol.io/specification/2026-07-28 Listings: Gensyn, Model Context Protocol, Personal Agent Protocol, Universal Commerce Protocol ## Multi agent URL: https://theagenteconomy.si/glossary/multi-agent Last verified: 2026-10-17 Multi agent is defined here as follows. More than one agent collaborating under a runtime. CrewAI pairs event driven Flows for control flow with Crews of role based agents that share a delegated task. The directory source for this term is CrewAI introduction. More than one agent collaborating under a runtime. CrewAI pairs event driven Flows for control flow with Crews of role based agents that share a delegated task. Source: CrewAI introduction: https://docs.crewai.com/v1.15.28/en/introduction Listings: CrewAI, Google ADK, Microsoft Agent Framework ## PACT URL: https://theagenteconomy.si/glossary/pact Last verified: 2026-10-17 PACT is defined here as follows. Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. The directory source for this term is PACT protocol overview. Protocol on A2A 1.0 that lets a personal agent sign its requests and act for a user only inside scopes that user approved with a brand. Source: PACT protocol overview: https://openpactprotocol.org/ Listings: PACT ## Payment facilitator URL: https://theagenteconomy.si/glossary/payment-facilitator Last verified: 2026-10-17 Payment facilitator is defined here as follows. A service that verifies a payment and settles it for the seller. In x402 the server asks the facilitator to verify, does the work, then asks the facilitator to settle. The directory source for this term is Coinbase documentation for how x402 works. A service that verifies a payment and settles it for the seller. In x402 the server asks the facilitator to verify, does the work, then asks the facilitator to settle. Source: Coinbase documentation for how x402 works: https://docs.cdp.coinbase.com/x402/how-it-works Listings: Nevermined, x402 ## Personal Agent Protocol URL: https://theagenteconomy.si/glossary/personal-agent-protocol Last verified: 2026-10-17 Personal Agent Protocol is defined here as follows. Draft protocol for a company to publish how a personal agent may sign in and act on a person's account, using OAuth, OpenAPI, and MCP. The directory source for this term is Personal Agent Protocol overview. Draft protocol for a company to publish how a personal agent may sign in and act on a person's account, using OAuth, OpenAPI, and MCP. Source: Personal Agent Protocol overview: https://personalagentprotocol.org/docs/introduction Listings: Personal Agent Protocol ## Policy engine URL: https://theagenteconomy.si/glossary/policy-engine Last verified: 2026-10-17 Policy engine is defined here as follows. Software that returns a decision from policy code, separate from the application that enforces it. Open Policy Agent evaluates structured input against Rego policy. The directory source for this term is Open Policy Agent documentation. Software that returns a decision from policy code, separate from the application that enforces it. Open Policy Agent evaluates structured input against Rego policy. Source: Open Policy Agent documentation: https://www.openpolicyagent.org/docs Listings: Invariant, Open Policy Agent ## Spend limit URL: https://theagenteconomy.si/glossary/spend-limit Last verified: 2026-10-17 Spend limit is defined here as follows. A budget on model calls. LiteLLM Proxy enforces personal, team, and agent spend budgets when a database is connected. The directory source for this term is LiteLLM proxy budgets. Last verified 2026-10-17. The directory lists 9 entries that use this term. A budget on model calls. LiteLLM Proxy enforces personal, team, and agent spend budgets when a database is connected. Source: LiteLLM proxy budgets: https://docs.litellm.ai/docs/proxy/users Listings: Coinbase Agentic Wallet, Hedera Agent Accounts, LiteLLM Proxy, MetaMask Agent Wallet, Polygon Agent CLI, Pydantic AI, Stripe link-cli, Sui Agentic Payments, Tempo Wallet ## Tool call URL: https://theagenteconomy.si/glossary/tool-call Last verified: 2026-10-17 Tool call is defined here as follows. A function an MCP server exposes for a model to execute. The MCP specification treats a tool as code execution and says hosts must get explicit user consent before invoking one. The directory source for this term is Model Context Protocol specification. A function an MCP server exposes for a model to execute. The MCP specification treats a tool as code execution and says hosts must get explicit user consent before invoking one. Source: Model Context Protocol specification: https://modelcontextprotocol.io/specification/2026-07-28 Listings: Claude Agent SDK, Google ADK, Lakera Guard, Model Context Protocol, NeMo Guardrails, OpenAI Agents SDK, smolagents, Strands Agents ## Universal Commerce Protocol URL: https://theagenteconomy.si/glossary/ucp Last verified: 2026-10-17 Universal Commerce Protocol is defined here as follows. Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A. The directory source for this term is Universal Commerce Protocol specification. Last verified 2026-10-17. Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A. Source: Universal Commerce Protocol specification: https://ucp.dev/latest/specification/overview/ Listings: AP2, Universal Commerce Protocol ## Web Bot Auth URL: https://theagenteconomy.si/glossary/web-bot-auth Last verified: 2026-10-17 Web Bot Auth is defined here as follows. Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are still an IETF draft. The directory source for this term is Cloudflare Web Bot Auth documentation. Method for an automated client to sign HTTP requests so a site can verify which bot or agent sent them. The signature rules are still an IETF draft. Source: Cloudflare Web Bot Auth documentation: https://developers.cloudflare.com/bots/reference/bot-verification/web-bot-auth/ Listings: Visa Trusted Agent Protocol, Web Bot Auth ## x402 URL: https://theagenteconomy.si/glossary/x402 Last verified: 2026-10-17 x402 is defined here as follows. Open standard for per request HTTP payments. The server quotes a price, the client sends the request again with proof of payment, and a facilitator can verify and settle it. The directory source for this term is Coinbase documentation for how x402 works. Open standard for per request HTTP payments. The server quotes a price, the client sends the request again with proof of payment, and a facilitator can verify and settle it. Source: Coinbase documentation for how x402 works: https://docs.cdp.coinbase.com/x402/how-it-works Listings: Coinbase Agentic Wallet, Hedera Agent Accounts, MetaMask Agent Wallet, Nevermined, Polygon Agent CLI, Sui Agentic Payments, x402 # Stats ## x402 adoption, claimed vs measured URL: https://theagenteconomy.si/stats/x402-adoption Last verified: 2026-10-19 This page quotes x402 adoption as a vendor claim beside an independent measurement, both checked on 2026-10-19. The claim is published by x402 in x402.org Last 30 Days panel. The measurement is published by x402scan in x402scan overall stats. The two sides use different metric labels. This page does not compute a ratio or a gap. Vendor claim: Checked on 2026-10-19, x402.org Last 30 Days panel, published by x402, states Transactions, labeled Last 30 Days, panel unchanged since an April 17 2026 archive capture as 75.41M, and the source gives no calendar date. Checked on 2026-10-19, x402.org Last 30 Days panel, published by x402, states Volume, labeled Last 30 Days, panel unchanged since an April 17 2026 archive capture as $24.24M, and the source gives no calendar date. Checked on 2026-10-19, x402.org Last 30 Days panel, published by x402, states Buyers, labeled Last 30 Days, panel unchanged since an April 17 2026 archive capture as 94.06K, and the source gives no calendar date. Checked on 2026-10-19, x402.org Last 30 Days panel, published by x402, states Sellers, labeled Last 30 Days, panel unchanged since an April 17 2026 archive capture as 22K, and the source gives no calendar date. Independent measurement: Checked on 2026-10-19, x402scan overall stats, published by x402scan, states Transactions, past 30 days as 3.02M, and the source gives no calendar date. Checked on 2026-10-19, x402scan overall stats, published by x402scan, states Volume, past 30 days as $1.22M, and the source gives no calendar date. Checked on 2026-10-19, x402scan overall stats, published by x402scan, states Buyers, past 30 days as 36.24K, and the source gives no calendar date. Checked on 2026-10-19, x402scan overall stats, published by x402scan, states Sellers, past 30 days, higher than the x402.org panel figure of 22K, and not re-read from a static fetch of the client rendered page as 38K, and the source gives no calendar date. Notes: On 2026-09-27, ChainWard, x402 on Base, one week on chain states that ChainWard measured one week of x402 on Base, 2026-09-15 through 2026-09-21: $128,977 settled, and at least $56,268 (43.6%) looped back. On 2026-09-27, ChainWard, x402 on Base, one week on chain states that ChainWard says the x402.org Last 30 Days panel appears unchanged since an April 17 2026 archive capture, including the transaction, volume, buyer, and seller figures. On 2026-10-19, x402scan overall stats states that x402scan states 38K sellers while the x402.org panel states 22K sellers. The two counts may use different definitions or windows. A static fetch of x402scan does not show the figure, so this measured seller count is kept only with that caveat. Site: https://theagenteconomy.si