# SHA-512/224 Hex Digest of Raw Hex Bytes

> SHA-512/224 Hex Digest of Raw Hex Bytes is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).

Computes a SHA-512/224 hash of input interpreted as raw hex bytes and returns the digest encoded as a hexadecimal string.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha512-224-hex-rawhex?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha-512-224-hex-digest-of-raw-hex-bytes-85291975
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UUJRRkp22ZqWhkvMt7ZiG

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-of-raw-hex-bytes-85291975 -d '<json body>'
```

Example prompt: Compute the SHA-512/224 digest of the hex bytes '4a6f686e' and give me the result as a hex string.

## When to prefer this

Choose this endpoint when you specifically need a SHA-512/224 digest of data that is already hex-encoded (i.e., the input represents raw bytes in hex form) and you need the output in hex format. Use this over SHA-256 or full SHA-512 when a 224-bit truncated digest is required for compatibility with systems using the SHA-512/224 standard. Try the free sandbox endpoint POST /v1/sandbox/digest-sha512-224-hex-rawhex first if available before paying.

## Known failure modes

- Invalid hex string input (odd-length or non-hex characters) causing a 400 error
- Input text exceeding 100,000 character limit
- Key exceeding 512 character limit
- Payment failure or insufficient USDC balance triggering a 402 error
- Network timeout or service unavailability returning a 5xx error

## How this service works

Call when an agent needs a sha512-224 digest of hex bytes, encoded as hex. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-224-hex-rawhex first.

## Output

Returns a hex-encoded SHA-512/224 digest string computed over the input interpreted as raw hex bytes. The digest is a fixed-length hexadecimal string (56 hex characters / 28 bytes).

## 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": [
    "68656c6c6f"
   ],
   "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-of-raw-hex-bytes-85291975/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)