# SHA3-256 Base64url Digest (Latin1 Input)

> SHA3-256 Base64url Digest (Latin1 Input) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-29).

Computes a SHA3-256 cryptographic hash of Latin1-encoded text and returns the digest encoded as base64url.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-256-base64url-latin1?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-256-base64url-digest-latin1-input-67e664fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_D76LpL-WoQat1h-VHgk1E

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 sha3-256-base64url-digest-latin1-input-67e664fa -d '<json body>'
```

Example prompt: Can you compute the SHA3-256 hash of this Latin1 text and give me the result as base64url? The text is: 'Héllo Wörld, this is my payload to hash.'

## When to prefer this

Choose this endpoint when you specifically need a SHA3-256 hash (not SHA-256 or MD5) with base64url output encoding (not hex) and the input is Latin1-encoded text. It is the right choice when downstream systems expect the SHA3-256 algorithm combined with base64url encoding and Latin1 byte semantics, distinguishing it from sibling endpoints that use SHA-256 hex or different encodings.

## Known failure modes

- Input text contains characters not representable in Latin1 encoding — may return encoding error
- Text exceeds 100,000 character limit — request rejected
- Key field empty or exceeds 512 characters — validation error
- Network or payment failure — 402 or 5xx response

## How this service works

Call when an agent needs a sha3-256 digest of latin1 bytes, encoded as base64url. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-base64url-latin1 first.

## Output

Returns the SHA3-256 digest of the provided Latin1-encoded text, encoded as a base64url string. The output is a fixed-length cryptographic hash suitable for integrity checks, deduplication, or tamper detection.

## 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/sha3-256-base64url-digest-latin1-input-67e664fa/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)