# SHA3-256 Base64 Digest (UTF-16LE) — agentshelf.syntexa.ch

> SHA3-256 Base64 Digest (UTF-16LE) — 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 2026-09-29).

Computes a SHA3-256 hash of text encoded as UTF-16LE bytes, returning the digest as a Base64 string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-256-base64-utf16?utm_source=zero.xyz
- Price: $0.01/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-base64-digest-utf-16le-agentshelf-syntexa-ch-b925ddd5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7Fsuhis1dyOA7P755RJbP

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-base64-digest-utf-16le-agentshelf-syntexa-ch-b925ddd5 -d '<json body>'
```

Example prompt: Compute the SHA3-256 hash of the text 'Hello, World!' using UTF-16LE encoding and give me the result as a Base64 string.

## When to prefer this

Choose this endpoint when you specifically need a SHA3-256 digest computed over the UTF-16LE byte representation of a string (common for interoperability with Windows/.NET systems) and want the result as Base64. Prefer the free sandbox variant (/v1/sandbox/digest-sha3-256-base64-utf16) first to avoid cost; use this paid version when the sandbox is unavailable or rate-limited. Not suitable if you need SHA-256 (not SHA3), a different encoding (UTF-8, ASCII), or a hex-encoded output rather than Base64.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- Text exceeding 100,000 characters is rejected
- Missing 'key' field may cause authentication failure
- Payment not attached or insufficient USDC triggers a 402 response
- Malformed request body returns a 400 error

## How this service works

Call when an agent needs a sha3-256 digest of utf16le bytes, encoded as base64. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-base64-utf16 first.

## Output

Returns a Base64-encoded SHA3-256 hash string computed from the input text serialized as UTF-16LE bytes. The result is a fixed-length, deterministic digest suitable for integrity checks, deduplication, or keyed lookups.

## 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-base64-digest-utf-16le-agentshelf-syntexa-ch-b925ddd5/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)