# SHA3-224 Digest to Base64url (Raw Hex Input)

> SHA3-224 Digest to Base64url (Raw Hex Input) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Computes a SHA3-224 hash of hex-encoded bytes and returns the digest encoded as base64url

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-224-base64url-rawhex?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-224-digest-to-base64url-raw-hex-input-c3ff8d49
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F1uLstTUIcPoj4xELJtsD

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 sha3-224-digest-to-base64url-raw-hex-input-c3ff8d49 -d '<json body>'
```

Example prompt: Compute the SHA3-224 hash of these hex bytes — '48656c6c6f' — and give me the result as a base64url string.

## When to prefer this

Use this endpoint when you need to hash raw binary data expressed as hexadecimal and require the output in base64url encoding specifically using the SHA3-224 algorithm. Prefer this over the free sandbox equivalent (/v1/sandbox/digest-sha3-224-base64url-rawhex) only when the sandbox is unavailable or rate-limited. Choose this over SHA-256 or SHA-512 variants when SHA3-224 is specifically required by a protocol or standard.

## Known failure modes

- Invalid hex string input (odd length or non-hex characters) returns an error
- Input text exceeds 100,000 character limit
- Missing required 'text' field returns a validation error
- Payment of $0.003 USDC not provided or fails — HTTP 402 response
- Malformed request body returns 400 error

## How this service works

Call when an agent needs a sha3-224 digest of hex bytes, encoded as base64url. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-224-base64url-rawhex first.

## Output

Returns a SHA3-224 digest of the input hex bytes, encoded as a base64url string. The digest is 28 bytes (224 bits) long, represented compactly in URL-safe base64 without padding issues.

## 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/sha3-224-digest-to-base64url-raw-hex-input-c3ff8d49/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)