# SHA3-512 Hex Digest of Raw Hex Bytes

> SHA3-512 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 2026-10-02).

Computes a SHA3-512 hash of raw bytes supplied as a hex string, returning the digest encoded as a lowercase hex string.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-512-hex-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/sha3-512-hex-digest-of-raw-hex-bytes-53f89d7c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8KcnWKwuLfvmc5kRKysMx

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 sha3-512-hex-digest-of-raw-hex-bytes-53f89d7c -d '<json body>'
```

Example prompt: Can you compute the SHA3-512 hash of this hex byte string '4a6f686e446f65' and give me back the digest as hex?

## When to prefer this

Choose this endpoint when you need a SHA3-512 hash of raw binary data supplied as a hex string, particularly in contexts requiring Keccak-family 512-bit digests. Prefer the unpaid sandbox variant (POST /v1/sandbox/digest-sha3-512-hex-rawhex) for testing; use this paid endpoint for production workloads when a $0.003 USDC per-call cost is acceptable.

## Known failure modes

- Invalid hex string input (odd length or non-hex characters) results in an error response
- Input text field empty or exceeds 100,000 character limit
- Payment not included or insufficient USDC causes a 402 Payment Required response
- Malformed request body returns a validation error

## How this service works

Call when an agent needs a sha3-512 digest of hex bytes, encoded as hex. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-512-hex-rawhex first.

## Output

Returns a SHA3-512 digest of the input bytes (provided as hex) encoded as a lowercase hexadecimal string, suitable for integrity checks or cryptographic fingerprinting.

## 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/sha3-512-hex-digest-of-raw-hex-bytes-53f89d7c/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)