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Ethereum Signer Recovery
x402
Ethereum Signer Recovery is a paid API for AI agents from twin.unykorn.org, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-01).
Recovers the Ethereum address that produced a given message signature, enabling signature verification and identity validation on EVM chains.
Price / call$0.003
Success—
StatusUnknown
How this service works
Recover which address signed a message — Genesis402 / UnyKorn Operator Network
Output
Returns a JSON object with an ok flag, the endpoint type identifier 'eth-recover-signer', the recovered Ethereum signer address, and a payment receipt containing the transaction hash, USD amount charged, and a unique receipt ID.
Example use cases
Authenticate wallet-signed login
“A user says they own address 0xABCD…1234 and gave me the message 'Login to MyApp at timestamp 1718000000' with signature 0x1a2b3c…ff01 — can you recover the signer and confirm it matches their claimed address?”
Verify NFT transfer authorization
“I have a signed authorization message 'Transfer token 42 to 0xDEAD…BEEF' and the signature 0xaabbcc…dd01 — recover which Ethereum address signed it so I can check if it was the token owner.”
Audit on-chain governance vote
“This governance proposal vote was signed off-chain with message 'Vote YES on proposal 7' and signature 0x112233…9901 — recover the signer address so I can verify it came from an eligible voter.”
Technical details
Endpoint
POSThttps://twin.unykorn.org/eth-recover-signer?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a pay-per-call, no-infrastructure-required ecrecover operation accessible via HTTP from an AI agent. Ideal when you do not want to run your own Ethereum node or library, need a neutral third-party receipt for audit purposes, or are operating in an agent pipeline that already uses x402 micropayment rails. Prefer alternatives (local ethers.js / web3.py) for high-volume or latency-critical workloads where $0.003/call cost accumulates.
Side effects
- Invalid or malformed signature (not a valid hex string starting with 0x) returns an error
- Message exceeding 49152 character limit is rejected
- Signature of incorrect length (not 65 bytes / 132 hex chars) fails ecrecover
- Payment failure via x402 protocol results in 402 response before processing
- Network timeout on the UnyKorn operator node
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| params | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"type": "eth-recover-signer",
"receipt": {
"tx_hash": "0x<64hex>",
"amount_usd": 0.003,
"receipt_id": "g402-<16hex>"
},
"generated_at": "<iso8601>"
}
}Tags
x402
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