# SHA3-384 Hex-to-Base64URL Digest

> SHA3-384 Hex-to-Base64URL Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.007/call, status unknown (last checked 2026-10-02).

Computes a SHA3-384 cryptographic hash of raw hex-encoded bytes and returns the result encoded as base64url

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-384-base64url-rawhex?utm_source=zero.xyz
- Price: $0.007/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-384-hex-to-base64url-digest-f7b77d4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2P63-eWZlD4FacRIdWdeD

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-to-base64url-digest-f7b77d4d -d '<json body>'
```

Example prompt: Can you compute the SHA3-384 hash of these raw hex bytes — '4a6f686e' — and give me the result as a base64url string?

## When to prefer this

Choose this endpoint when you specifically need a SHA3-384 hash (not SHA2, SHA3-256, or other algorithms) of raw hex-encoded bytes with the output in base64url encoding. It is ideal for blockchain, cryptographic verification, or interoperability scenarios requiring this exact combination of algorithm and encoding. If a free sandbox variant at /v1/sandbox/digest-sha3-384-base64url-rawhex is available, prefer that first to avoid the $0.007 USDC charge.

## Known failure modes

- Invalid hex input (non-hex characters in text field) returns an error
- Input exceeds 100,000 character limit causes rejection
- Missing required fields returns validation error
- Payment not received or incorrect amount results in 402 response
- Malformed key field (exceeds 512 characters) causes rejection

## How this service works

Call when an agent needs a sha3-384 digest of hex bytes, encoded as base64url. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-384-base64url-rawhex first.

## Output

Returns a SHA3-384 cryptographic digest of the provided raw hex bytes, encoded as a base64url string. The response is a compact, URL-safe representation of the 384-bit hash suitable for use in APIs, tokens, or integrity checks.

## 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/sha3-384-hex-to-base64url-digest-f7b77d4d/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)