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X Pay Keccak256 Hash
x402
X Pay Keccak256 Hash is a paid API for AI agents from www.api-xpay.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Computes a Keccak-256 cryptographic hash of provided input data, payable per-request via USDC on Base using x402.
Price / call$0.005
Success—
StatusUnknown
How this service works
Pay-per-request utility APIs powered by x402 using USDC on Base.
Output
Returns a JSON object containing the keccak256 hex hash string (prefixed with 0x), a success boolean, the algorithm name ('keccak256'), the payment asset ('USDC'), and the network ('base').
Example use cases
Smart contract event topic hashing
“Compute the keccak256 hash of 'Transfer(address,address,uint256)' so I can use it as the event topic signature in my Ethereum contract.”
Data integrity verification for blockchain
“I need to keccak256 hash this JSON object before storing its fingerprint on-chain — can you run it through the hasher and give me the hex result?”
Solidity abi.encodePacked pre-hash
“Hash the value 'approve(address,uint256)' with keccak256 so I can match the function selector in my Solidity code.”
Technical details
Endpoint
POSThttps://www.api-xpay.com/x402/keccak?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a pay-per-use keccak256 hash with no API key setup, especially for blockchain/Ethereum/Solidity use cases such as event topic generation, function selectors, or on-chain fingerprinting. It is ideal for low-frequency hashing needs where a per-call micropayment model (x402/USDC) is preferred over subscription-based alternatives.
Side effects
- Missing required 'input' body field returns validation error
- Invalid bodyType enum value causes request rejection
- Insufficient USDC payment via x402 results in 402 Payment Required response
- Malformed JSON body returns parse error
- Network congestion on Base may delay payment confirmation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"hash": "0x1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8",
"asset": "USDC",
"network": "base",
"success": true,
"algorithm": "keccak256"
}
}Tags
x402
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