{"slug":"saylorinnovations-com-api-chain-verify-1271-a9c636","title":"Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, a","host":"saylorinnovations.com","method":"GET","resource":"https://saylorinnovations.com/api/chain/verify-1271","category":"market","description":"Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, account abstraction and other multisig wallets via isValidSignature.","price_listed":0.01,"price_asked":0.01,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":319,"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":{"chain":"ethereum","contract":"0x849D52316331967b6fF1198e5E32A0eB168D039d","hash":"0x0000000000000000000000000000000000000000000000000000000000000000","signature":"0x00"},"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":{"chain":{"description":"chain name (ethereum, base, arbitrum, optimism, polygon, bsc, avalanche, gnosis, linea, scroll, mantle, blast, sonic, celo, berachain, unichain) or chain id","type":"string"},"contract":{"description":"the smart-contract wallet that should have signed","type":"string"},"hash":{"description":"the 32-byte digest that was signed, as 0x hex","type":"string"},"signature":{"description":"the signature bytes as 0x hex (format depends on the wallet)","type":"string"}},"required":["chain","contract","hash","signature"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"properties":{"chain":{"description":"the chain name that was queried","type":"string"},"chain_id":{"description":"EIP-155 chain id of that network","type":"number"},"contract":{"description":"the smart-contract wallet checked","type":"string"},"hash":{"description":"the digest that was signed","type":"string"},"note":{"description":"plain-language reading of the result, including units","type":"string"},"returned_value":{"description":"first four bytes the wallet returned","type":["string","null"]},"reverted":{"description":"true when the wallet call failed","type":"boolean"},"signature_bytes":{"description":"length of the signature","type":"number"},"source":{"description":"where the data was read from","type":"string"},"valid":{"description":"true when the wallet accepted the signature","type":"boolean"}},"required":["chain","chain_id","contract","hash","valid","reverted","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":319,"error":null}],"description_full":"Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, account abstraction and other multisig wallets via isValidSignature.","last_updated":"2026-10-21T04:12:34.875Z","schemes":["exact"]}