# SHA-384 Digest (Base64URL) — agentshelf.syntexa.ch

> SHA-384 Digest (Base64URL) — agentshelf.syntexa.ch is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).

Computes a SHA-384 cryptographic hash of input text and returns it encoded as base64url, with no network or LLM calls.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha384-base64url?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha-384-digest-base64url-agentshelf-syntexa-ch-1e2355fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_CsRleV28PQHkg4buqGN9T

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 sha-384-digest-base64url-agentshelf-syntexa-ch-1e2355fc -d '<json body>'
```

Example prompt: Can you compute the SHA-384 hash of the text 'Hello, world!' and give it to me encoded as base64url?

## When to prefer this

Prefer this endpoint when you need a SHA-384 digest (not SHA-256, SHA-512, or BLAKE2b) specifically in base64url encoding, particularly for JWT headers, URL-safe integrity tokens, or systems that require the SHA-384 algorithm. Use the free sandbox endpoint (POST /v1/sandbox/digest-sha384-base64url) first to test. Choose this over SHA-256 when compliance or protocol requirements mandate SHA-384 strength.

## Known failure modes

- Text exceeds 100,000 character limit — request rejected
- Empty text or key field — validation error
- Missing required 'text' field — schema validation failure
- Payment not provided or incorrect amount — HTTP 402 response
- Network error reaching the endpoint

## How this service works

Call when an agent needs a sha384 digest of text, encoded as base64url. No network and no LLM. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-sha384-base64url first.

## Output

Returns a SHA-384 cryptographic digest of the submitted text, encoded in base64url format (no padding, URL-safe characters). The response is deterministic — the same input always yields the same output.

## 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/sha-384-digest-base64url-agentshelf-syntexa-ch-1e2355fc/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)