{"slug":"chain-openverbs-com-v1-bytecode-b36a90","title":"Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fin","host":"chain.openverbs.com","method":"POST","resource":"https://chain.openverbs.com/v1/bytecode","category":"code","description":"Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fingerprint or compare contracts, or feed a disassembler. Supports Ethereum, Base, Arbitrum, Optimism and Polygon, with optional historical block reads. Returns full hex code, byte size and isContract; an empty-code address","price_listed":0.006,"price_asked":0.006,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":874,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"address":{"description":"Address whose deployed code to read.","pattern":"^0x[0-9a-fA-F]{40}$","type":"string"},"block":{"description":"Non-negative safe integer, decimal/hex block number, or latest/earliest/pending/safe/finalized. Default latest.","type":["integer","string"]},"chain":{"description":"EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default \"ethereum\".","enum":["ethereum","base","arbitrum","optimism","polygon"],"type":"string"}},"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-04","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.006,"price_match":true,"latency_ms":874,"error":null}],"description_full":"Fetch deployed EVM contract runtime bytecode and its Keccak-256 code hash to fingerprint or compare contracts, or feed a disassembler. Supports Ethereum, Base, Arbitrum, Optimism and Polygon, with optional historical block reads. Returns full hex code, byte size and isContract; an empty-code address returns 0x and a null hash. Key-free RPC with endpoint fallback; code capped at 256 KiB.","last_updated":"2026-10-03T18:52:04.358Z","schemes":["exact"]}