Agent protocols

Open protocol, hosted by the Linux Foundation, for agents to discover each other through Agent Cards and collaborate over HTTP using JSON-RPC.

discovery, agent-cards, json-rpc

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.

identity, discovery, did

Open standard for an agent to browse a catalog, run a checkout session, and pass a delegated payment to a business.

commerce, checkout, delegation

Open stack, hosted by the Linux Foundation, for cross vendor agent discovery, identity, messaging, and observability.

discovery, identity, messaging

Open protocol that connects LLM applications to external tools, resources, and prompts through a standard request interface.

tools, resources, prompts

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.

consent, identity, a2a

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.

consent, oauth, discovery

Open commerce protocol so agents, businesses, and payment providers can negotiate checkout and identity linking over REST, MCP, or A2A.

commerce, checkout, discovery