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agentshelf.syntexa.ch Blake2s-256 Base64url Digest (Hex Bytes)
x402
agentshelf.syntexa.ch Blake2s-256 Base64url Digest (Hex Bytes) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-29).
Computes a BLAKE2s-256 digest of raw hex-encoded bytes and returns the result encoded as base64url
Price / call$0.003
Success—
StatusUnknown
How this service works
Call when an agent needs a blake2s256 digest of hex bytes, encoded as base64url. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64url-rawhex first.
Output
A base64url-encoded BLAKE2s-256 digest string computed over the raw bytes represented by the provided hex input, optionally keyed if a key is supplied.
Example use cases
Integrity fingerprint for binary payload
“I have some binary data represented as hex — '0a1b2c3d4e5f' — can you compute a BLAKE2s-256 base64url digest of it using the key 'integrity-check' so I can verify it later?”
Keyed MAC for API message signing
“I need a keyed BLAKE2s-256 digest of the hex string 'cafe0011ff3399aa' using my signing key 'api-secret-v2', encoded as base64url, to include as a message authentication code in my API request.”
Compact hash for hex-encoded cryptographic nonce
“Please hash the hex nonce '8f3c72b1d49a0e56' with BLAKE2s-256 using key 'nonce-validator' and return the base64url result so I can store it compactly.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-blake2s256-base64url-rawhex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need a BLAKE2s-256 hash of raw binary data supplied as hex, with the output in base64url format, and the free sandbox endpoint (/v1/sandbox/digest-blake2s256-base64url-rawhex) is unavailable or rate-limited. Prefer it over SHA-family hashing endpoints when BLAKE2s speed and compactness matter, and over generic base64 encoding endpoints when a cryptographic digest is required.
Side effects
- Invalid hex string input (odd-length or non-hex characters) causing a 4xx error
- Key exceeds maximum length of 512 characters resulting in a validation error
- Text field exceeds 100,000 character limit causing rejection
- Network timeout or 5xx server error during computation
- Payment failure or insufficient USDC balance causing a 402 response
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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