# SHA3-256 Hex Digest of Raw Hex Bytes

> SHA3-256 Hex Digest of Raw Hex Bytes is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.009/call, status unknown (last checked 2026-09-29).

Computes a SHA3-256 hash of raw hex-encoded bytes and returns the digest as a hex string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-256-hex-rawhex?utm_source=zero.xyz
- Price: $0.009/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-256-hex-digest-of-raw-hex-bytes-a2e8164a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__YBZjyxrUq1LYJVFgLh4M

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 sha3-256-hex-digest-of-raw-hex-bytes-a2e8164a -d '<json body>'
```

Example prompt: Can you compute the SHA3-256 hash of these raw hex bytes — 'deadbeef0102030405' — and give me the result as a hex string?

## When to prefer this

Choose this endpoint when you specifically need a SHA3-256 hash of raw hex-encoded bytes with hex output — particularly for blockchain, smart contract, or cryptographic workflows where SHA3-256 (Keccak variant or NIST standard) is required over SHA2 alternatives. Use the free sandbox endpoint (/v1/sandbox/digest-sha3-256-hex-rawhex) first if available to avoid the $0.009 USDC charge.

## Known failure modes

- Invalid or malformed hex input may cause a 400 error
- Input text exceeding 100,000 characters will be rejected
- Missing required key or text fields returns a validation error
- Payment failure or insufficient USDC balance returns a 402 error

## How this service works

Call when an agent needs a sha3-256 digest of hex bytes, encoded as hex. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-hex-rawhex first.

## Output

Returns a SHA3-256 hash digest of the provided hex-encoded byte input, encoded as a lowercase hex string. The digest is deterministic and fixed-length (64 hex characters for SHA3-256).

## 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/sha3-256-hex-digest-of-raw-hex-bytes-a2e8164a/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)