# SHA-512/224 Hex Digest (UTF-16LE) — agentshelf.syntexa.ch

> SHA-512/224 Hex Digest (UTF-16LE) — agentshelf.syntexa.ch is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-23).

Computes a SHA-512/224 hash of the input text encoded as UTF-16LE bytes and returns the digest as a lowercase hexadecimal string.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha512-224-hex-utf16?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha-512-224-hex-digest-utf-16le-agentshelf-syntexa-ch-22e7d161
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AtjN9fXmInbnKXKJ99IN7

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 sha-512-224-hex-digest-utf-16le-agentshelf-syntexa-ch-22e7d161 -d '<json body>'
```

Example prompt: Give me the SHA-512/224 hex digest of the text 'Hello, World!' treated as UTF-16LE bytes.

## When to prefer this

Choose this endpoint when you specifically need a SHA-512/224 digest (the 224-bit truncated variant of SHA-512) computed over UTF-16LE encoded bytes and returned as hexadecimal. This is particularly useful for compatibility with Windows-native string encodings or legacy systems that store text as UTF-16LE. If you need a different hash algorithm, encoding (e.g. base64, base32), or character encoding (e.g. UTF-8, latin1), prefer the appropriate sibling endpoint. Try the free sandbox endpoint POST /v1/sandbox/digest-sha512-224-hex-utf16 first before paying.

## Known failure modes

- Text or key exceeding maxLength (512 for key, 100000 for text) returns a validation error
- Empty string for text or key (minLength 1) returns a validation error
- Malformed request body returns a 400 error
- Payment failure or insufficient USDC balance returns a 402 error
- Service unavailability returns a 5xx error

## How this service works

Call when an agent needs a sha512-224 digest of utf16le bytes, encoded as hex. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-224-hex-utf16 first.

## Output

Returns the SHA-512/224 cryptographic digest of the input text (interpreted as UTF-16LE bytes), encoded as a lowercase hexadecimal string. The output is a 56-character hex string representing the 224-bit hash value.

## 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/sha-512-224-hex-digest-utf-16le-agentshelf-syntexa-ch-22e7d161/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)