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SHA-512/256 Digest (Base64url) — agentshelf.syntexa.ch
x402
SHA-512/256 Digest (Base64url) — agentshelf.syntexa.ch 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 SHA-512/256 cryptographic hash of the provided text and returns it encoded as a base64url string.
Price / call$0.007
Success—
StatusUnknown
How this service works
Call when an agent needs a sha512-256 digest of text, encoded as base64url. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-256-base64url first.
Output
Returns a base64url-encoded string representing the SHA-512/256 cryptographic hash of the input text. The digest is computed locally with no network calls or LLM involvement, guaranteeing deterministic and reproducible output for identical inputs.
Example use cases
Content fingerprinting for deduplication
“I need a base64url-encoded SHA-512/256 fingerprint of this article text so I can detect duplicates: 'The quick brown fox jumps over the lazy dog. This is the full article body here.'”
Integrity token for API payload
“Hash this JSON payload string for me using SHA-512/256 and encode it as base64url so I can attach it as an integrity token: '{"user":"alice","action":"transfer","amount":100}'”
Deterministic ID generation from user input
“Generate a SHA-512/256 base64url digest of the string 'user:alice@example.com:2024-06-01' so I can use it as a stable, collision-resistant identifier.”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/digest-sha512-256-base64url?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need a SHA-512/256 hash (a truncated variant of SHA-512 with a different initialization vector) encoded in URL-safe base64url format. Prefer this over the hex or base32 variants when the digest will be embedded in URLs, JWT tokens, or other contexts where padding-free URL-safe encoding is required. Use the free sandbox endpoint (/v1/sandbox/digest-sha512-256-base64url) for testing before paying.
Side effects
- Text or key field missing or empty (minLength:1 violated) — returns 400 Bad Request
- Text exceeds 100,000 character limit — returns 400 or 413
- Payment of exactly $0.007 USDC not provided — returns 402 Payment Required
- Invalid input types (e.g. non-string values) — returns 400 Bad Request
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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