{"service":"code402-verify","version":"1.3.0","transport":"MCP over JSON-RPC 2.0 (Streamable HTTP): POST to this URL","tool":{"name":"x402_verify","input":{"raw_receipt":"string — the full signed XDR-1 receipt JSON","settlement_asset":"string? — default USDC"}},"free":true,"verifies":"XDR-1 receipts: keccak over the canonical receipt, secp256k1 signer recovery, compared to the declared signer","machine_surface":"https://hcrb.in","human_surface":"https://code402.dev"}