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CoinOpSelect Merkle Proof Verification API
x402
CoinOpSelect Merkle Proof Verification API 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 a Merkle proof by checking whether a given leaf and proof path are valid against a specified Merkle root
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 (string, value 'merkle-verify') and a 'valid' boolean indicating whether the supplied leaf, proof path, and Merkle root form a cryptographically valid inclusion proof.
Example use cases
Verify airdrop eligibility inclusion
“I have a leaf value '0xuser123', a Merkle root '0xROOT456' and a proof path '["0xA1","0xB2","0xC3"]' from an airdrop claim — can you check if this Merkle proof is valid so I know if I'm actually on the whitelist?”
On-chain data integrity audit
“We stored a data hash as a leaf '0xdatahash789' in a Merkle tree with root '0xROOT999', and here's the proof '["0xP1","0xP2"]' — please verify this proof to confirm the data hasn't been tampered with.”
Smart contract proof validation before submission
“Before I submit a Merkle proof to the smart contract, can you pre-validate it? Leaf is '0xleaf42', root is '0xroot77', and the JSON proof array is '["0xside1","0xside2","0xside3"]'.”
Technical details
Endpoint
GEThttps://coinop.publicvm.com/api/v1/proof/merkle-verify?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, pay-per-call cryptographic Merkle proof inclusion check without deploying your own verifier infrastructure. It is especially useful for AI agents operating on Base/blockchain workflows that need to verify whitelist membership, airdrop eligibility, or data integrity proofs before taking further on-chain actions. Prefer this over rolling your own verifier when cost-per-call economics ($0.01 USDC) are acceptable and you want a hosted, stateless verification service.
Side effects
- Invalid or malformed proof JSON array causes validation failure or error
- Incorrect leaf preimage (wrong encoding or hash) results in valid=false even if proof structure is correct
- Root hex mismatch returns valid=false without further detail
- Missing required query parameters (leaf, proof, or root) may return a 4xx error
- Payment failure via x402 protocol blocks the request before verification occurs
- Non-hex or improperly formatted root returns an error response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"query": "merkle-verify",
"valid": true
}
}Tags
x402
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