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HMAC Calculator API
x402
HMAC Calculator API is a paid API for AI agents from api.x402node.dev, paid per call via x402, $0.008/call, status unknown (last checked 2026-09-14).
Computes an HMAC (Hash-based Message Authentication Code) for a given message and secret key using a specified hash algorithm (SHA-256, SHA-512, SHA-1, or MD5).
Price / call$0.008
Success—
StatusUnknown
How this service works
HMAC calculator, HMAC-SHA256 SHA512 SHA1 MD5, message authentication code, hash with secret, signed hash, API request signing, webhook signature, JWT signature. Compute HMAC of a message with a secret key using any standard hash algorithm. Accepts payment on Base or Solana — either network works.
Output
Returns the HMAC digest as a hex-encoded string computed from the provided message and secret key using the specified hash algorithm (SHA-256, SHA-512, SHA-1, or MD5).
Example use cases
Example prompt
“Compute the HMAC-SHA256 of the message 'order_id=12345&amount=99.99' using the secret key 'my-webhook-secret-key' so I can verify this webhook payload.”
Technical details
Endpoint
GEThttps://api.x402node.dev/crypto/hmacWhen to prefer
Use this endpoint when you need to compute or verify an HMAC for webhook signature validation, API request signing, or any scenario requiring keyed message authentication. Prefer over a plain hash endpoint when a secret key is required to authenticate the origin of a message.
Side effects
- Missing message or secret key returns 400 error
- Invalid or unsupported algorithm name returns 400 error
- Empty message or empty secret key may return error or zero-length digest
- Network timeout or service unavailability returns 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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