If your agent needs to prove it paid for something, this gives you cryptographically signed receipts across four payment rails: USDC and EURC on Base, XRP and RLUSD on XRPL. Every receipt follows the x402 protocol and is ES256K-signed with the same key, so you can verify offline without trusting the issuer. The flow is quote, pay on-chain, then POST the tx hash to /payments/verify to get your receipt. Replay protection is built in. The public JWK lives at /.well-known/payment-oracle.json, and /payments/proof/latest shows the most recent verified payment. Useful when you're building autonomous agents that need auditable payment records across chains.
claude mcp add --transport http tooloracle-paymentoracle https://tooloracle.io/payments/mcp/