Misa

AI agents can now pay for APIs and data, but payment is one-way: the agent pays with no guarantee it gets what it paid for. No delivery checks, no automatic refunds, no recourse. That's what stops people from trusting agents with real money.

We built open-source auth-capture for x402 on the XRP Ledger:

• XRPL binding spec: Native escrow with a deadline, no smart contracts.
• npm package x402-auth-capture-xrpl: Buyer, seller, and facilitator schemes for @x402/core.
• Live non-custodial facilitator: Creates escrows, releases payments with the verifier's key, and automatically cancels expired escrows.
• Proven on testnet: Honest sellers get paid exactly; cheating sellers get nothing. The agent loses only a 12-drop network fee.

Misa is the first product built on this infrastructure. Its proprietary verification engine checks every API response against the seller's published promises before releasing payment.

Misa also helps API sellers open for business to AI agents. Sellers connect their existing APIs, and Misa makes them discoverable and payable by agents, helping sellers define machine-readable delivery requirements. If verification passes, the seller gets paid. If it fails, the agent's funds are returned after expiry. Every transaction produces a signed receipt.

In our demo: A seller goes live in minutes. An autonomous agent discovers and purchases company data. A broken response never gets paid; a successful retry releases XRP to the seller on testnet.