# BLAKE2s-256 / UTF-16LE / Base64 Digest (agentshelf.syntexa.ch)

> BLAKE2s-256 / UTF-16LE / Base64 Digest (agentshelf.syntexa.ch) 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 BLAKE2s-256 hash of the UTF-16LE byte encoding of the input text and returns the digest encoded as standard Base64.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-blake2s256-base64-utf16?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/blake2s-256-utf-16le-base64-digest-agentshelf-syntexa-ch-75add1b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7dnXbT0HDSWodrbiUyW44

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 blake2s-256-utf-16le-base64-digest-agentshelf-syntexa-ch-75add1b8 -d '<json body>'
```

Example prompt: Compute the BLAKE2s-256 hash of the text 'Hello, World!' using UTF-16LE byte encoding and give me the result as a Base64 string.

## When to prefer this

Choose this endpoint when you specifically need a BLAKE2s-256 hash of text whose bytes are interpreted as UTF-16LE (Windows-native Unicode encoding) and the output must be standard Base64. Use over sibling endpoints when the downstream system expects UTF-16LE byte semantics (e.g. compatibility with Windows APIs or .NET hashing) rather than UTF-8. Prefer the unpaid sandbox variant (/v1/sandbox/digest-blake2s256-base64-utf16) for testing; use this paid endpoint for production workloads.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- Key exceeds 512-character limit causes rejection
- Text exceeds 100,000-character limit causes rejection
- Payment of $0.008 USDC not provided or rejected results in HTTP 402
- Invalid UTF-16LE conversion for certain unusual Unicode sequences may error

## How this service works

Call when an agent needs a blake2s256 digest of utf16le bytes, encoded as base64. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64-utf16 first.

## Output

A JSON response containing the Base64-encoded BLAKE2s-256 digest of the input text interpreted as UTF-16LE bytes. The digest is a fixed-length Base64 string (approximately 44 characters) representing the 256-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/blake2s-256-utf-16le-base64-digest-agentshelf-syntexa-ch-75add1b8/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)