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CoinOpSelect Attestation Verify
x402
CoinOpSelect Attestation Verify is a paid API for AI agents from coinop.publicvm.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).
Verifies the validity of an on-chain attestation object, confirming its hash, input query, and output result are authentic.
Price / call$0.01
Success—
StatusUnknown
How this service works
Paid on-chain token, wallet, contract and research data over x402 on Base.
Output
Returns a JSON object with a 'query' field set to 'attestation-verify' and a 'valid' boolean indicating whether the submitted attestation is authentic and intact.
Example use cases
Validate agent contract summary
“Before I trust this contract summary my agent produced, can you verify the attestation? The hash is 0xdeadbeef, the input was 'explain this contract', and the output was 'This is a standard ERC-20 token contract.'”
Check wallet data attestation integrity
“I got back some wallet balance data with an attestation — hash 0x1234abcd, input 'get wallet balance', output was '12.5 ETH'. Can you confirm this attestation is valid and hasn't been tampered with?”
Audit agent research output authenticity
“I need to verify this on-chain attestation before publishing: hash 0xfeed5678, original query was 'research token DOGE on Base', output result was a market summary. Is the attestation legitimate?”
Technical details
Endpoint
POSThttps://coinop.publicvm.com/api/v1/attestation/verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to cryptographically confirm that an AI agent's output or on-chain data query result is backed by a legitimate attestation on Base. Prefer this over manual hash comparison or off-chain trust when operating in an agent pipeline that requires auditability and on-chain provenance of results.
Side effects
- Invalid or malformed attestation hash returns valid: false
- Missing required attestation fields causes a 400 or similar error
- Unrecognized hash not found on-chain may return valid: false
- Payment failure via x402 results in 402 Payment Required before processing
- Network or provider downtime causes timeout or 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| attestation | object |
Output
Schema · Response
{
"type": "json",
"example": {
"query": "attestation-verify",
"valid": true
}
}Tags
x402
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