# SHA3-384 Hex Digest

> SHA3-384 Hex Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-01).

Computes a SHA3-384 cryptographic hash of input text and returns it as a lowercase hex-encoded string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-384-hex?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-384-hex-digest-ca22c74f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_e8FmvrScEAV9ZqI362dRp

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 sha3-384-hex-digest-ca22c74f -d '<json body>'
```

Example prompt: Can you compute the SHA3-384 hash of the text 'Hello, world! This is my message.' and give me the result as a hex string?

## When to prefer this

Choose this endpoint when you need a SHA3-384 digest specifically encoded as hexadecimal (rather than base64 or other encodings). Use it when deterministic, reproducible hashing of text is required without any external dependencies, network lookups, or AI inference. Prefer the free sandbox endpoint POST /v1/sandbox/digest-sha3-384-hex for testing before using this paid version.

## Known failure modes

- Missing or empty 'text' field returns a validation error
- Text exceeding 100,000 characters is rejected
- Missing or invalid API key returns 402 Payment Required
- Malformed request body returns 400 Bad Request

## How this service works

Call when an agent needs a sha3-384 digest of text, encoded as hex. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-384-hex first.

## Output

Returns a SHA3-384 hex-encoded digest string (96 hexadecimal characters) deterministically derived from the input text. The computation is performed locally without any network calls or LLM involvement, guaranteeing reproducibility.

## 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/sha3-384-hex-digest-ca22c74f/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)