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HMAC String Signing
x402
HMAC String Signing is a paid API for AI agents from pyfile-agent.taile3ff35.ts.net:10000, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).
Computes an HMAC (Hash-based Message Authentication Code) of an input string using a specified algorithm and secret key
Price / call$0.003
Success—
StatusUnknown
How this service works
HMAC a string. ?algo=sha256&key=k&input=hello
Output
Returns the HMAC digest of the input string computed with the specified algorithm (e.g. sha256) and secret key, typically as a hex-encoded string representing the cryptographic signature.
Example use cases
Webhook signature validation
“Compute the HMAC-SHA256 of this webhook payload 'user_id=42&event=purchase' using my secret key 'wh_secret_abc123' so I can verify it matches the signature header from the request.”
API request signing
“I need to sign the string 'GET /api/orders?timestamp=1718000000' with my API secret 'sk_live_xyz789' using SHA256 HMAC — what's the resulting digest?”
Message authentication code generation
“Generate an HMAC for the message 'transfer:1000:USD:to:alice' using the key 'shared_secret_99' with SHA256 so I can prove it hasn't been tampered with.”
Technical details
Endpoint
GEThttps://pyfile-agent.taile3ff35.ts.net:10000/data/hmacWhen to prefer
Use this endpoint when you need a quick, stateless HMAC computation without setting up a local cryptography library — especially useful in agent workflows where you need to sign payloads, authenticate API requests, or verify message integrity on the fly using SHA256 or similar algorithms.
Side effects
- Missing required 'input' parameter returns an error
- Unsupported algorithm value returns an error
- Empty or missing key may result in an error or weakened HMAC
- Invalid or malformed query parameters return a 400-style error
- Network or server unavailability returns a 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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