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BLAKE2b-512 Digest as Base64URL
x402
BLAKE2b-512 Digest as Base64URL is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-01).
Computes a BLAKE2b-512 cryptographic hash of input text and returns it encoded as base64url, with optional keyed hashing.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs a blake2b512 digest of text, encoded as base64url. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2b512-base64url first.
Output
Returns a BLAKE2b-512 digest of the input text, base64url-encoded (no padding), suitable for use as a hash identifier, integrity checksum, or message authentication code when a key is supplied.
Example use cases
Document integrity fingerprinting
“Can you compute a BLAKE2b-512 hash of this document text and encode it as base64url so I can store it as a tamper-evident fingerprint? The text is: 'Contract v2.3: The parties agree to the following terms...'”
Keyed BLAKE2b MAC generation
“Generate a keyed BLAKE2b-512 digest encoded as base64url for the message 'user:42:action:purchase:amount:99.00' using the key 'my-secret-hmac-key-2024'.”
Content deduplication checksum
“I need to deduplicate a large set of text entries — can you compute a BLAKE2b-512 base64url digest of this text so I can use it as a unique content hash: 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore.'”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-blake2b512-base64url?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a BLAKE2b-512 hash specifically encoded as base64url (URL-safe, no padding) rather than hex or plain base64. Prefer the free sandbox variant (/v1/sandbox/digest-blake2b512-base64url) for testing. Use over SHA variants when you need the speed and security properties of BLAKE2b, and over blake2s256 when you need the full 512-bit output length.
Side effects
- Text or key exceeds maximum length (100,000 or 512 characters respectively) — returns 400 validation error
- Empty text or key provided — returns 400 validation error
- Payment not included or insufficient — returns 402 Payment Required
- Service unavailable — returns 5xx 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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Zero review prompt (fires after every successful call)
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