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x402-tools Cryptographic Hash API
x402
x402-tools Cryptographic Hash API is a paid API for AI agents from x402.nichospt.net, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-12).
Computes cryptographic hash digests (SHA-256, SHA-1, SHA-512, MD5) or HMAC signatures for arbitrary input strings, paid per-call in USDC via x402.
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-call utility APIs for AI agents, settled in USDC via the x402 protocol.
Output
A JSON object containing the computed digest string (hex or base64 encoded), the algorithm used, the encoding format, and a boolean indicating whether an HMAC was computed instead of a plain hash.
Example use cases
Example prompt
“Hash the string 'hello world' using SHA-256 and give me the result as a hex digest — and use HMAC with the key 'mysecret' if you can.”
Technical details
Endpoint
POSThttps://x402.nichospt.net/hash?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to compute cryptographic hash digests or HMAC signatures on-demand without managing local cryptographic libraries, especially in serverless or sandboxed environments. It is pay-per-call with no subscription, making it ideal for low-frequency or one-off hashing tasks settled in USDC via x402.
Side effects
- Input exceeds 2,000,000 character limit — request rejected
- Unsupported algorithm value outside sha256/sha1/sha512/md5 enum — validation error
- Invalid encoding value outside hex/base64 — validation error
- Payment not settled via x402 — 402 Payment Required response
- HMAC key provided but malformed — error in digest computation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| input | string | |
| encoding | string | |
| hmac_key | string | If set, returns an HMAC instead of a plain hash |
| algorithm | string |
Output
Schema · Response
{
"type": "json",
"example": {
"hmac": false,
"digest": "2cf24dba5fb0a30e26e83b2ac5b9e29e1b161e5c1fa7425e73043362938b9824",
"encoding": "hex",
"algorithm": "sha256"
}
}Tags
x402
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