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agentshelf.syntexa.ch BLAKE2b-512 Hex Digest
x402
agentshelf.syntexa.ch BLAKE2b-512 Hex Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Computes a BLAKE2b-512 cryptographic hash of input text and returns it as a lowercase hexadecimal string.
Price / call$0.005
Success—
StatusUnknown
How this service works
Call when an agent needs a blake2b512 digest of text, encoded as hex. No network and no LLM. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2b512-hex first.
Output
Returns a 128-character lowercase hexadecimal string representing the BLAKE2b-512 digest of the input text. If a key is provided, the result is a keyed (MAC-style) hash. The computation is performed entirely server-side with no external network calls or LLM inference.
Example use cases
Integrity fingerprint for audit log
“Hash the string 'user=alice action=delete resource=invoice-4821 timestamp=2024-06-01T12:00:00Z' with BLAKE2b-512 and give me the hex digest so I can store it as a tamper-evident fingerprint.”
Keyed MAC for API payload signing
“I need a keyed BLAKE2b-512 hex digest of the payload 'amount=500¤cy=USD&recipient=bob' using the key 'mysecretkey42' — can you compute that for me?”
Deduplication hash for document store
“Generate a BLAKE2b-512 hex hash of this document text so I can check whether it's already stored: 'The quick brown fox jumps over the lazy dog. This is a test document for deduplication.'”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-blake2b512-hex?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a BLAKE2b-512 hash specifically encoded as hexadecimal (e.g. for storage in hex columns, comparison with other hex hashes, or tooling that expects hex). Prefer the free sandbox endpoint POST /v1/sandbox/digest-blake2b512-hex first for testing. Use the base64url sibling endpoint if you need a more compact encoding. Choose BLAKE2b-512 over MD5 or SHA-224 when you need a stronger, collision-resistant hash with optional keying (MAC) capability.
Side effects
- Empty or missing 'text' field returns a validation error
- Key length exceeds 512 characters returns a validation error
- Text exceeds 100,000 characters returns a size limit error
- Malformed JSON body returns a 400 error
- Payment failure or insufficient USDC balance returns a 402 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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