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x402 Utils – Cryptographic Hash
x402
x402 Utils – Cryptographic Hash is a paid API for AI agents from utils.kagurazaka.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).
Computes MD5, SHA-1, SHA-256, SHA-512, SHA3-256, and Keccak-256 hashes of text or binary data (as UTF-8, hex, or base64), returning results in both hex and base64 encodings.
Price / call$0.001
Success—
StatusUnknown
How this service works
MD5, SHA-1, SHA-256, SHA-512, SHA3-256 and Keccak-256 (Ethereum) of a text, or of bytes given as hex or base64, as hex and base64.
Output
A JSON object containing the byte count of the input and, for each requested algorithm, an object with 'hex' and optionally 'base64' representations of the digest. For example: {"bytes":5,"sha256":{"hex":"2cf24dba..."},"keccak256":{"hex":"1c8aff95..."}}
Example use cases
Ethereum smart contract input hashing
“Compute the Keccak-256 hash of the UTF-8 string 'transfer(address,uint256)' — I need the hex output for an Ethereum function selector.”
File integrity checksum verification
“Hash these bytes (given as base64: 'SGVsbG8gV29ybGQ=') using SHA-256 and SHA-512 so I can verify the file hasn't been tampered with.”
Multi-algorithm digest for audit log
“Give me the MD5, SHA-1, and SHA-256 hashes of the text 'audit-record-20240601-user42' encoded as UTF-8, so I can store all three digests in our audit trail.”
Technical details
Endpoint
POSThttps://utils.kagurazaka.dev/v1/hash?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to compute one or more cryptographic hashes of a string or binary payload in a single API call, especially when multiple algorithms are needed simultaneously or when Ethereum-compatible Keccak-256 is required. It is particularly useful for agents that need data integrity checksums, blockchain function selectors, or audit digests without running local code.
Side effects
- Input text exceeds 1 MB limit — request rejected
- Invalid encoding type specified for 'input' field — validation error
- Unrecognized algorithm name in 'algorithms' array — validation error
- Malformed hex or base64 in 'text' field when input encoding is hex or base64 — parse error
- Missing 'text' field — required parameter error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | what to hash (up to 1 MB) |
| input | string | how text is encoded (default utf8) |
| algorithms | array | which hashes (default all) |
Output
Schema · Response
{
"type": "json",
"example": {
"bytes": 5,
"sha256": {
"hex": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824"
},
"keccak256": {
"hex": "1c8aff950685c2ed4bc3174f3472287b56d9517b9c948127319a09a7a36deac8"
}
}
}Tags
x402
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