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CoinOpSelect Proof Commit API
x402
CoinOpSelect Proof Commit 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).
Generates a cryptographic commitment (hash) for a given value, optionally with a salt, for use in on-chain proof protocols on Base.
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 two hex-encoded fields: 'commitment' (the cryptographic hash of the value, optionally salted) and 'salt' (the hex salt used, either provided or auto-generated). These can be submitted to a smart contract as part of a commit-reveal protocol on Base.
Example use cases
Blind vote commitment on Base
“I need to commit my vote of 'option-A' before the reveal phase of the on-chain voting contract — can you generate a commitment hex with a random salt for the value 'option-A'?”
Secret answer for a prediction market
“Before I submit my prediction to the smart contract, I need to commit the value '42' — generate a commitment and salt so I can store them and reveal later.”
Verifiable randomness seed commitment
“I want to commit to a random seed value 'f3a9c1' on-chain before the game starts — use the proof commit API and return the commitment hex and salt for me to record.”
Technical details
Endpoint
GEThttps://coinop.publicvm.com/api/v1/proof/commit?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a paid, on-chain-ready cryptographic commitment for a commit-reveal scheme on Base, and you want payment handled via x402 USDC microtransactions. Prefer it over generic hashing utilities when the result must integrate with CoinOpSelect's broader on-chain proof infrastructure or when you need a salt managed server-side.
Side effects
- Missing required 'value' query parameter returns an error
- Invalid hex format for the 'salt' parameter may cause a parsing error
- Payment failure via x402 (insufficient USDC balance or bad payment header) returns HTTP 402
- Network or server unavailability on publicvm.com returns HTTP 5xx
- Malformed 'type' or 'method' fields in the input object may return a 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"salt": "hex",
"commitment": "hex"
}
}Tags
x402
Reviews
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