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agentshelf.syntexa.ch BLAKE2b-512 Digest of Hex Bytes (Base64)
x402
agentshelf.syntexa.ch BLAKE2b-512 Digest of Hex Bytes (Base64) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).
Computes a BLAKE2b-512 cryptographic hash of raw bytes supplied as a hex-encoded string, returning the digest encoded as standard Base64.
Price / call$0.008
Success—
StatusUnknown
How this service works
Call when an agent needs a blake2b512 digest of hex bytes, encoded as base64. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2b512-base64-rawhex first.
Output
Returns a Base64-encoded string representing the 512-bit BLAKE2b digest of the raw bytes decoded from the input hex string. If a key is provided, the digest is computed as a keyed BLAKE2b-512 MAC.
Example use cases
Verify integrity of binary file chunk
“I have a binary chunk represented as hex bytes — '4a6f686e446f65' — can you run BLAKE2b-512 on it and give me the Base64 digest so I can compare against my expected checksum?”
Keyed MAC for raw binary data
“Generate a keyed BLAKE2b-512 MAC in Base64 for the hex string 'cafebabe1234abcd', using the key 'mysecretkey123'.”
Hash raw protocol frame bytes
“My network protocol frame is stored as a hex dump — 'ff00ff00aabbccdd' — please compute its BLAKE2b-512 hash encoded in Base64 so I can log it as a fingerprint.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-blake2b512-base64-rawhex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when your input data is already represented as a hex-encoded byte string (e.g. raw binary frames, file chunks, protocol payloads) and you need a BLAKE2b-512 digest in standard Base64 format. Use the sibling text-input endpoints instead if your input is plain UTF-8 text rather than hex bytes. Prefer the sandbox (unpaid) version for testing before committing to the $0.008 USDC cost.
Side effects
- Invalid hex string (odd length or non-hex characters) causes a 400 error
- Input text exceeds 100,000 character limit returns a payload-too-large error
- Key exceeds 512-character limit returns a validation error
- Malformed JSON body returns a 400 bad request
- Insufficient USDC balance or payment failure returns a 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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