# SHA-512 / Base32 Digest

> SHA-512 / Base32 Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).

Computes a SHA-512 cryptographic hash of input text and returns it encoded as a Base32 string, with no network or LLM involvement.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha512-base32?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha-512-base32-digest-f0f85ca1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Tjitxl9MwWTDhEwFN36xV

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-512-base32-digest-f0f85ca1 -d '<json body>'
```

Example prompt: Can you compute the SHA-512 hash of the text 'Hello, world!' and give it back to me as a Base32-encoded string?

## When to prefer this

Choose this endpoint when you specifically need a SHA-512 digest encoded in Base32 (not hex or Base64). It is fully deterministic, requires no LLM or external network calls, and is ideal for fingerprinting, content integrity checks, or generating unique identifiers. Use the free sandbox endpoint (/v1/sandbox/digest-sha512-base32) first for testing before paying $0.01 USDC per call on this production endpoint.

## Known failure modes

- Missing or empty 'text' field returns a validation error
- Text exceeding 100,000 characters is rejected
- Invalid key format may return a 4xx error
- Payment failure (insufficient USDC balance) returns HTTP 402
- Malformed JSON body returns a parsing error

## How this service works

Call when an agent needs a sha512 digest of text, encoded as base32. No network and no LLM. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-base32 first.

## Output

Returns a Base32-encoded string representing the SHA-512 cryptographic digest of the provided input text. The result is deterministic, fixed-length, and computed purely in-process with no external network calls or LLM inference.

## 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-512-base32-digest-f0f85ca1/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)