Checks whether a signature was made by a claimed EVM address
Checks whether a signature was made by a claimed EVM address: EIP-191 personal_sign messages, EIP-712 typed data or a raw 32-byte digest, verified by ecrecover for wallets or ERC-1271 isValidSignature for smart-contract wallets (Safe, Coinbase Smart Wallet) on Ethereum, Base, Arbitrum, Optimism or Polygon. Returns validity, method, recovered signer and digest. Free sample: https://onchain-health.mick8511.workers.dev/sample
Answeringour last check, 2026-10-26
1 of 1checks answered this week
47 msmedian answer time
$0.002listed price per call
$0.002price 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
POST https://onchain-health.mick8511.workers.dev/verify-signature
| Category | Market data |
|---|---|
| Provider host | onchain-health.mick8511.workers.dev |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 0 from 0 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-26 | valid payment request | 402 | $0.002 | 47 ms |
Example input (from the provider)
{
"body": {
"address": "0xCD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826",
"hash": "0xbe609aee343fb3c4b28e1df9e632fca64fcfaede20f02e86244efddf30957bd2",
"signature": "0x4355c47d63924e8a72e509b65029052eb6c299d53a04e167c5775fd466751c9d07299936d304c153f6443dfa05f40ff007d72911b6f72307f996231605b915621c"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"properties": {
"address": {
"description": "Claimed signer",
"pattern": "^0x[0-9a-fA-F]{40}$",
"type": "string"
},
"chain": {
"description": "Chain for ERC-1271 checks (default ethereum)",
"type": "string"
},
"hash": {
"description": "32-byte digest",
"type": "string"
},
"message": {
"description": "EIP-191 message text (or use typed_data / hash)",
"type": "string"
},
"signature": {
"description": "0x hex signature",
"type": "string"
},
"typed_data": {
"description": "EIP-712 typed data {types, primaryType, domain, message}",
"type": "object"
}
},
"required": [
"address",
"signature"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"headers": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"queryParams": {
"additionalProperties": {
"type": "string"
},
"type": "object"
},
"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"
}