# SHA3-256 / Base32 Text Digest

> SHA3-256 / Base32 Text Digest is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.006/call, status unknown (last checked 2026-10-01).

Computes a SHA3-256 cryptographic hash of input text and returns it encoded as a Base32 string, with no network calls or LLM involvement.

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-sha3-256-base32?utm_source=zero.xyz
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/sha3-256-base32-text-digest-bc3b75a8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hryI7BnzOYOzH5q9jryYO

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 sha3-256-base32-text-digest-bc3b75a8 -d '<json body>'
```

Example prompt: Hash the text 'Hello, world!' using SHA3-256 and give me the result encoded as Base32.

## When to prefer this

Choose this endpoint when you specifically need a SHA3-256 digest (Keccak-based, stronger than SHA2 family) encoded in Base32 (uppercase alphanumeric, no padding ambiguity). Prefer it over SHA-256 endpoints when SHA3 compliance is required, and over hex-encoded siblings when Base32 output is needed for case-insensitive or alphanumeric-safe storage. Always try the free sandbox variant first before incurring the $0.006 USDC charge.

## Known failure modes

- Missing or empty 'text' field returns a validation error
- 'text' exceeding 100,000 characters is rejected
- Missing or invalid 'key' field may result in authentication failure
- Payment failure (insufficient USDC) results in a 402 response; use the free sandbox endpoint /v1/sandbox/digest-sha3-256-base32 first

## How this service works

Call when an agent needs a sha3-256 digest of text, encoded as base32. No network and no LLM. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-256-base32 first.

## Output

Returns a Base32-encoded SHA3-256 hash string of the provided input text. The output is a deterministic, fixed-length digest suitable for integrity checks, deduplication keys, or audit tokens.

## 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/sha3-256-base32-text-digest-bc3b75a8/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)