# SHA3-512 Digest of UTF-16LE Bytes, Base64-Encoded

> SHA3-512 Digest of UTF-16LE Bytes, Base64-Encoded is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-02).

Computes a SHA3-512 cryptographic hash of text encoded as UTF-16LE bytes and returns the result as a Base64 string.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-512-base64-utf16?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-512-digest-of-utf-16le-bytes-base64-encoded-8517b266
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kzrklfxPF9L917ixYwSkM

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 sha3-512-digest-of-utf-16le-bytes-base64-encoded-8517b266 -d '<json body>'
```

Example prompt: Hash the text 'Hello, World!' using SHA3-512 over its UTF-16LE bytes and give me the result as base64.

## When to prefer this

Choose this endpoint when you specifically need a SHA3-512 hash computed over UTF-16LE byte encoding (common in Windows/Microsoft environments) with Base64 output format. Prefer the unpaid sandbox endpoint /v1/sandbox/digest-sha3-512-base64-utf16 for testing. Use this paid endpoint when the sandbox is unavailable or when production-grade reliability is required. If you need SHA3-512 over plain UTF-8 or different output encodings (hex, base64url), look for sibling endpoints on agentshelf.syntexa.ch.

## Known failure modes

- Input text is empty or missing — returns validation error
- Text exceeds 100,000 character limit — request rejected
- Key parameter is missing or empty — returns error
- Malformed request body — returns HTTP 400
- Payment of $0.004 USDC not provided or rejected — returns HTTP 402
- Service temporarily unavailable — returns HTTP 5xx

## How this service works

Call when an agent needs a sha3-512 digest of utf16le bytes, encoded as base64. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-512-base64-utf16 first.

## Output

Returns a Base64-encoded SHA3-512 cryptographic digest computed over the UTF-16LE byte representation of the input text. The output is a fixed-length Base64 string corresponding to the 512-bit hash.

## 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/sha3-512-digest-of-utf-16le-bytes-base64-encoded-8517b266/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)