Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, a
Verify a smart contract wallet signature (ERC-1271) on 16 EVM chains for Safe, account abstraction and other multisig wallets via isValidSignature.
Answeringour last check, 2026-10-21
1 of 1checks answered this week
319 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/chain/verify-1271
| Category | Market data |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-21 | valid payment request | 402 | $0.01 | 319 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"chain": "ethereum",
"contract": "0x849D52316331967b6fF1198e5E32A0eB168D039d",
"hash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"signature": "0x00"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
}