# SHA-512/256 Digest (Base64url, Latin-1) — agentshelf.syntexa.ch

> SHA-512/256 Digest (Base64url, Latin-1) — agentshelf.syntexa.ch is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Computes a SHA-512/256 cryptographic digest of a latin1-encoded text string and returns it encoded as base64url.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha512-256-base64url-latin1?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha-512-256-digest-base64url-latin-1-agentshelf-syntexa-ch-ef9f464d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mJ_X7xoIcaPITTm9DBqJI

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability sha-512-256-digest-base64url-latin-1-agentshelf-syntexa-ch-ef9f464d -d '<json body>'
```

Example prompt: Hash the text 'Héllo wörld' using SHA-512/256 treating it as latin1 bytes, and give me the result as a base64url string.

## When to prefer this

Choose this endpoint when you need specifically a SHA-512/256 digest (not SHA-256 or SHA-512) of latin1-encoded bytes, output as base64url. It is preferred over alternatives when URL-safe encoding is required and the input is latin1 text. Use the free sandbox POST /v1/sandbox/digest-sha512-256-base64url-latin1 first; fall back to this paid endpoint when the sandbox is unavailable or rate-limited.

## Known failure modes

- Text exceeds 100,000 character limit — request rejected
- Text or key is empty or missing — validation error
- Characters outside latin1 range may produce unexpected encoding behavior
- Payment of exactly $0.01 USDC not provided — 402 Payment Required

## How this service works

Call when an agent needs a sha512-256 digest of latin1 bytes, encoded as base64url. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-256-base64url-latin1 first.

## Output

Returns a SHA-512/256 cryptographic digest of the provided latin1-encoded text string, expressed as a base64url-encoded string. The output is deterministic, URL-safe, and suitable for use as a checksum, cache key, or compact cryptographic fingerprint.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "key": {
   "type": "string",
   "maxLength": 512,
   "minLength": 1,
   "description": "HMAC secret. Required on HMAC SKUs. Omit it for plain digests and checksums. The key is not stored."
  },
  "text": {
   "type": "string",
   "examples": [
    "hello"
   ],
   "maxLength": 100000,
   "minLength": 1,
   "description": "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."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/sha-512-256-digest-base64url-latin-1-agentshelf-syntexa-ch-ef9f464d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentshelf.syntexa.ch](https://www.zero.xyz/host/agentshelf.syntexa.ch/llms.txt)