{"slug":"lumenworks-x402-decoder-onrender-com-v1-calldata-decode-33bc6a","title":"Use when you hold raw EVM calldata and need to know what function it calls","host":"lumenworks-x402-decoder.onrender.com","method":"POST","resource":"https://lumenworks-x402-decoder.onrender.com/v1/calldata/decode","category":"other","description":"Use when you hold raw EVM calldata and need to know what function it calls: returns selector, matching signatures (built-in + openchain/4byte) and ABI-decoded args for each candidate; unknown selectors return signaturesFound:0 instead of an error. Optional {signature} override. Example: 0xa9059cbb… ","price_listed":0.002,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:42220","eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"data":"0xa9059cbb000000000000000000000000ee9790cb3960952f585379f831a89b4e00b4029a00000000000000000000000000000000000000000000000000000000000f4240"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"data":{"description":"Calldata hex starting with the 4-byte selector (0x…)","type":"string"},"signature":{"description":"Optional function signature override, e.g. transfer(address,uint256)","type":"string"}},"required":["data"]},"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":[],"description_full":"Use when you hold raw EVM calldata and need to know what function it calls: returns selector, matching signatures (built-in + openchain/4byte) and ABI-decoded args for each candidate; unknown selectors return signaturesFound:0 instead of an error. Optional {signature} override. Example: 0xa9059cbb… -> transfer(address,uint256) with args. $0.002, no signup; not charged if the call errors.","last_updated":"2026-10-11T02:37:47.519Z","schemes":["exact"]}