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HMAC-RIPEMD160-Base64 Signing
x402
HMAC-RIPEMD160-Base64 Signing is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).
Computes an HMAC-RIPEMD160 digest of input text using a caller-supplied key and returns it as a base64-encoded string.
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs an HMAC-ripemd160 of text with a caller-supplied key, encoded as base64. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/hmac-ripemd160-base64 first.
Output
Returns a base64-encoded HMAC-RIPEMD160 digest string computed from the provided text and key. The result is a compact, URL-safe-friendly representation of the keyed hash suitable for use as a signature, checksum, or authentication token.
Example use cases
Signing API payloads before dispatch
“I need to sign this JSON payload string '{"order_id":"12345","amount":99.99}' with the key 'prod-secret-2024' using HMAC-RIPEMD160, and give me the base64 result so I can attach it as a signature header.”
Verifying message authenticity in a pipeline
“Take the message 'user:42:action:login' and compute its HMAC-RIPEMD160 with the key 'pipeline-auth-key', base64 encoded — I need to compare it against the token sent by the upstream service.”
Generating a keyed checksum for stored records
“Generate an HMAC-RIPEMD160 base64 checksum for the text 'record:9876:status:confirmed' using the secret key 'rec-signing-key' so I can store it alongside the record for integrity checks.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/hmac-ripemd160-base64?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need the RIPEMD160 algorithm (rather than SHA-256 or SHA-512) for HMAC computation, particularly for compatibility with legacy systems, Bitcoin-ecosystem tooling, or protocols that mandate RIPEMD160 keyed hashing. It is ideal when you need the output in base64 format without additional transformation steps. Use the free sandbox endpoint (/v1/sandbox/hmac-ripemd160-base64) for testing before committing to the paid version.
Side effects
- Empty or missing 'key' field returns a validation error
- Empty or missing 'text' field returns a validation error
- 'key' exceeding 512 characters is rejected
- 'text' exceeding 100,000 characters is rejected
- Payment of $0.003 USDC not provided returns HTTP 402
- Malformed JSON body returns a 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| key | string | HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored. |
| text | string | Message to digest. For raw-hex SKUs this is hex bytes; for utf16 or latin1 SKUs it is decoded with that encoding. Otherwise it is UTF-8 text. |
Tags
x402
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