{"slug":"saylorinnovations-com-api-chain-decode-calldata-e4b3da","title":"Decode transaction input data into a function name and arguments for ERC-20, NFT","host":"saylorinnovations.com","method":"GET","resource":"https://saylorinnovations.com/api/chain/decode-calldata","category":"market","description":"Decode transaction input data into a function name and arguments for ERC-20, NFT, DEX router, multicall and ownership calls. Computed locally.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":569,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:137","eip155:42161","eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"data":"0xa9059cbb000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa9604500000000000000000000000000000000000000000000000000000000000f4240"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"data":{"description":"the transaction input data as 0x hex (selector plus encoded arguments, up to 16,384 bytes)","type":"string"}},"required":["data"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"argument_words":{"description":"32-byte words after the selector when unrecognized","type":["number","null"]},"arguments":{"description":"decoded arguments by parameter name","type":["object","null"]},"calldata_bytes":{"description":"length of the data in bytes","type":"number"},"function_name":{"description":"decoded function name","type":["string","null"]},"note":{"description":"plain-language reading of the result","type":"string"},"recognized":{"description":"true when the selector is in the built-in list","type":"boolean"},"selector":{"description":"first 4 bytes of the data","type":"string"},"signature":{"description":"function signature","type":["string","null"]},"source":{"description":"where the data was read from or how it was computed","type":"string"}},"required":["selector","recognized","calldata_bytes","note","source"],"type":"object"},"type":{"const":"json","type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-21","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.01,"price_match":true,"latency_ms":569,"error":null}],"description_full":"Decode transaction input data into a function name and arguments for ERC-20, NFT, DEX router, multicall and ownership calls. Computed locally.","last_updated":"2026-10-21T04:11:35.054Z","schemes":["exact"]}