{"resource":"https://x402-echo-service.onrender.com/chain/code","service":"Contract Check","areas":["onchain_reads"],"answering":true,"http_status":402,"latency_ms":139,"price_usdc":0.001,"buyers_30d":1,"calls_30d":1,"description":"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.","id":"7c1ca83ab8e3","category":"Blockchain reads","accuracy":null,"tool_calls":null,"checked_day":"2026-10-11","page":"https://velliumandco.com/sellers/7c1ca83ab8e3"}