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hash-hmac
x402
hash-hmac is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-12).
Compute an HMAC (MD5, SHA-1, SHA-256, or SHA-512) of a text string using a secret key
Price / call$0.002
Success—
StatusUnknown
How this service works
Compute an HMAC (MD5, SHA-1, SHA-256 or SHA-512) of text with a given key.
Output
Returns the HMAC digest of the input text computed with the specified algorithm (MD5, SHA-1, SHA-256, or SHA-512) and the provided secret key, typically as a hex-encoded string.
Example use cases
Webhook signature verification
“Generate an HMAC-SHA256 signature for the payload 'user_id=42&event=purchase×tamp=1716300000' using the secret key 'wh_secret_abc987' so I can compare it against the X-Signature header from the incoming webhook.”
OAuth 1.0 request signing
“I need an HMAC-SHA1 of the base string 'GET&https%3A%2F%2Fapi.example.com%2Fdata&oauth_nonce%3Dabc' using the signing key 'consumer_secret&token_secret' for an OAuth 1.0 API call.”
API payload integrity check
“Compute an HMAC-MD5 of the string 'TransactionID=TXN001&Amount=500' using the key 'sharedSecretKey' so I can append it as a checksum to my payment request.”
Technical details
Endpoint
GEThttps://x402.agentindex.world/hash/hmac?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, stateless HMAC computation without setting up a local crypto library — ideal for serverless agents, quick webhook signature generation, or environments where cryptographic primitives aren't readily available. Supports four common algorithms in a single API call.
Side effects
- Missing required 'key' or 'text' parameter returns an error
- Invalid algorithm value not matching md5|sha1|sha256|sha512 pattern returns validation error
- Empty key or text may produce unexpected or rejected results
- Network timeout or payment failure (x402) prevents call completion
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | |
| text | string | |
| algorithm | string |
Output
Schema · Response
{
"type": "json",
"example": {
"hex_digest": "8b5f48702995c1598c573db1e21866a9b825d4a794d169d7060a03605796360b"
}
}Tags
x402
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