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AgentShelf Blake2s-256 Hex Digest (Raw Hex Input)
x402
AgentShelf Blake2s-256 Hex Digest (Raw Hex Input) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-09-29).
Computes a keyed BLAKE2s-256 hash of raw hex-encoded bytes and returns the digest as a hex string.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs a blake2s256 digest of hex bytes, encoded as hex. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-hex-rawhex first.
Output
A JSON response containing the BLAKE2s-256 hex-encoded digest of the provided hex-encoded input bytes, computed optionally with a provided key string.
Example use cases
Integrity check for binary data
“I have this hex-encoded blob '4a6f686e446f65' — can you run a keyed BLAKE2s-256 hash on it using the key 'integritykey' and return the hex digest so I can verify it hasn't been tampered with?”
Keyed HMAC-style token generation
“Generate a BLAKE2s-256 keyed digest of the hex string 'ff00ab1234cd' using the key 'tokenkey99' — I need the result as hex to use as a lightweight authentication token.”
Checksum for protocol message
“I'm building a protocol and need a BLAKE2s-256 checksum of the raw hex message '0a1b2c3d4e5f' with the key 'proto-v1' returned as hex — can you compute that?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-blake2s256-hex-rawhex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need BLAKE2s-256 (not SHA-256 or BLAKE2b) over hex-encoded raw bytes with an optional key, and want the result as a hex string. Prefer the free sandbox endpoint (/v1/sandbox/digest-blake2s256-hex-rawhex) first; use this paid version when the sandbox is unavailable or rate-limited. Best for cryptographic integrity checks, keyed authentication tokens, or protocol-level checksums over binary data.
Side effects
- Invalid hex input (non-hex characters in text field) returns an error
- Key exceeds 512 character limit returns validation error
- Input text exceeds 100,000 character limit returns payload-too-large error
- Malformed JSON body returns 400 bad request
- Payment not included or insufficient USDC causes 402 Payment Required
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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