# SHA3-256 Hex Digest (Latin-1 Encoding)

> SHA3-256 Hex Digest (Latin-1 Encoding) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-02).

Computes a SHA3-256 hash of text interpreted as Latin-1 bytes and returns the result as a lowercase hexadecimal string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-256-hex-latin1?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-256-hex-digest-latin-1-encoding-329c38a5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_He5G7C2paECFspFBlhlkT

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-hex-digest-latin-1-encoding-329c38a5 -d '<json body>'
```

Example prompt: Hash the text 'Héllo Wörld' using SHA3-256 with Latin-1 byte encoding and give me the hex digest.

## When to prefer this

Choose this endpoint when you specifically need a SHA3-256 hash of text that uses Latin-1 (ISO-8859-1) byte encoding — common for legacy European text systems or protocols that operate in the Latin-1 character set. Prefer this over SHA-256 endpoints when the SHA-3 family (Keccak) is required, and over UTF-8-based hash endpoints when the input is constrained to Latin-1. Use the free sandbox variant (/v1/sandbox/digest-sha3-256-hex-latin1) for testing before incurring the $0.008 USDC cost.

## Known failure modes

- Text contains characters outside the Latin-1 range (U+0000–U+00FF), causing encoding errors or unexpected results
- Input text exceeds the 100,000 character maximum, resulting in a rejection error
- Missing or empty 'text' or 'key' fields trigger validation errors
- Payment of $0.008 USDC not provided or rejected, resulting in a 402 Payment Required response
- Network timeout or service unavailability returns a 5xx error

## How this service works

Call when an agent needs a sha3-256 digest of latin1 bytes, encoded as hex. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-hex-latin1 first.

## Output

Returns a lowercase hexadecimal string representing the SHA3-256 digest of the input text interpreted as Latin-1 (ISO-8859-1) encoded bytes. The hex string is 64 characters long, corresponding to the 256-bit output of SHA3-256.

## 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-hex-digest-latin-1-encoding-329c38a5/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)