# SHAKE-256 Digest with Base32 Encoding

> SHAKE-256 Digest with Base32 Encoding is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.008/call, status unknown (last checked 2026-10-01).

Computes a SHAKE-256 cryptographic hash of input text and returns the digest encoded in Base32 format.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-shake256-base32?utm_source=zero.xyz
- Price: $0.008/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/shake-256-digest-with-base32-encoding-7cbdbae0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_56zSAU4GA7B_f1M-BLlcQ

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 shake-256-digest-with-base32-encoding-7cbdbae0 -d '<json body>'
```

Example prompt: Hash the text 'Hello, world! This is my document content.' using SHAKE-256 and give me the result encoded in Base32.

## When to prefer this

Choose this endpoint when you specifically need a SHAKE-256 (XOF/extendable-output) hash and the consumer of the digest expects Base32 encoding (e.g., case-insensitive systems, certain identifier schemes). Prefer the free sandbox endpoint (/v1/sandbox/digest-shake256-base32) for testing. Use the SHAKE-128 variant if you need lower computational cost and the shorter digest strength is acceptable. Use the hex-encoded SHAKE-256 sibling if your system expects hexadecimal output instead of Base32.

## Known failure modes

- Empty or missing 'text' field returns a validation error
- 'text' field exceeding 100,000 characters is rejected
- Missing or empty 'key' field may cause a validation error depending on whether it is required
- Invalid JSON body returns a 400-level error
- Payment not included or insufficient USDC (not $0.008) results in a 402 Payment Required response
- Network or server error returns a 5xx response

## How this service works

Call when an agent needs a shake256 digest of text, encoded as base32. No network and no LLM. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/digest-shake256-base32 first.

## Output

A Base32-encoded string representing the SHAKE-256 digest of the submitted text. The response is a deterministic, fixed-output hash that can be used for integrity checking, deduplication, or fingerprinting.

## 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/shake-256-digest-with-base32-encoding-7cbdbae0/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)