{"service":"agent-seller-preflight","description":"Pay-per-call pre-payment honesty screen for any x402 endpoint (run BEFORE paying). POST /check with a target URL; pay $0.03 in USDC on Base per call.","payment":{"protocol":"x402 v2","network":"eip155:8453","price_per_call":"$0.03","mode":"mainnet"},"data_source":"live probes only - no static dataset (public: target 402 challenge, /.well-known/x402, CDP Bazaar discovery, Base RPC)","endpoints":{"POST /check":"{url: string} - full URL of the paid x402 endpoint to screen","GET /health":"liveness","GET /openapi.json":"OpenAPI 3.1 document","GET /.well-known/x402":"x402 resource manifest"},"disclaimer":"Informational only, not financial or security advice. This is a pre-payment sanity screen of a third party's x402 endpoint based on live probes at check time; it is not a guarantee of the seller's honesty, solvency, or data quality. Verify critical decisions independently."}