{"slug":"contract-check-3732bbd2","name":"Contract Check","summary":"Determine whether an address on Base is a contract or an externally owned account. POST {\"address\":\"0x...\"} and receive isContract, the bytecode size in bytes and its keccak-256 hash. Useful before sending funds to an unfamiliar address.","status":"unreachable","indexable":false,"listed_since":"2026-10-25T17:51:04.369098Z","sources":[{"source":"x402_bazaar","external_id":"https://x402-echo-service.onrender.com/chain/code","owner_address":"0x9cc774a8ed49d89cba1a288f4a050b8f7fba77ee","seen_at":"2026-10-26T05:59:28.211638Z","removed_at":"2026-10-26T15:49:35.475419Z"}],"endpoints":[{"url":"https://x402-echo-service.onrender.com/chain/code","host":"x402-echo-service.onrender.com","protocol":"x402","state":"unreachable","last_probe_at":"2026-10-25T21:31:11.764388Z","last_ok_at":null,"tools_count":null,"tools_changed_at":null,"uptime_24h":null,"uptime_30d":0.0}],"also_listed_as":[{"slug":"x402-echo-service-onrender-com-020aa159","name":"x402-echo-service.onrender.com"}],"payment_options":[],"usage":null,"assessment":{"method":"2026.10.1","checks":[{"id":"answers","state":"fail","reason":"Has not answered a check yet."},{"id":"owner","state":"fail","reason":"No one has proven control of its domain or of the wallet it is paid at."},{"id":"track_record","state":"fail","reason":"Listed for 0 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"No source reports paying wallets in the last 30 days."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":0,"applicable":4,"contradicted":false,"computed_at":"2026-10-26T15:49:56.222831Z"},"identity":{"endpoint_domains":["x402-echo-service.onrender.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[{"slug":"contract-check-0c5aa459","name":"Contract Check","proven_domain":null}],"namesake_count":1,"identity_checks":[],"wallet_attestations":[]},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}