{"cost_per_request_usdc":"0.002","description":"Verifies an on-chain transaction before an AI agent signs it. Returns SAFE | CAUTION | BLOCK with signed evidence in <100ms.","endpoints":[{"body":{"calldata":"string (hex calldata, '0x' for native transfer)","chain_id":"int (optional, default 8453 = Base)","intent":"string (optional \u2014 declared agent intent; enables 3-in-1 intent-match diagnostic)","to":"string (target address)","value":"int (wei, optional, default 0)"},"description":"Pre-flight transaction verification","method":"POST","path":"/check"}],"name":"Subcento \u2014 Pre-flight Transaction Verifier for AI Agents","pricing_model":"x402","verify_key":"99d59000e66922a9076d3910d23857574f5670561d978f57144ba278d3d50256","version":"1.0.0"}