Agent 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.

mandates, cards, stablecoins

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.

wallets, stablecoins, http-402, spend-limits

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.

wallets, spend-limits

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.

http-402, lightning, macaroons

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.

http-402, cards, stablecoins

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.

wallets, spend-limits, http-402

Payments facilitator that verifies and settles x402 and MPP charges against a payment plan, with metering and delegated card spending.

http-402, metering, cards

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.

wallets, spend-limits, http-402

Issues signed KYAPay tokens that bind an agent identity to a payment the buyer has committed, which the seller charges after delivery.

wallets, identity, kya

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.

cards, spend-limits, http-402

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.

http-402, spend-limits, stablecoins

Wallet and CLI that let an agent discover paid services, preview MPP terms, and pay under a max spend cap.

wallets, http-402, spend-limits

Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment.

http-402, stablecoins, pay-per-call