# BLAKE2s-256 Base64 Digest

> BLAKE2s-256 Base64 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 BLAKE2s-256 cryptographic hash of input text and returns it encoded as a base64 string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-blake2s256-base64?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/blake2s-256-base64-digest-8403e15e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WJR_2owtIPVBdLKaJkIY_

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 blake2s-256-base64-digest-8403e15e -d '<json body>'
```

Example prompt: Compute the BLAKE2s-256 hash of the text 'Hello, world!' and give me the result as a base64 string.

## When to prefer this

Choose this endpoint when you need a compact, secure BLAKE2s-256 hash of text output as base64 specifically — ideal when downstream systems expect base64-encoded digests rather than hex or base32. Prefer the free sandbox variant (/v1/sandbox/digest-blake2s256-base64) for testing. Use this paid endpoint for production workloads where reliability and guaranteed processing matter.

## Known failure modes

- Empty or missing text field returns validation error
- Key or text exceeding maximum length (512 and 100000 chars respectively) results in rejection
- Malformed request body returns 400-level error
- Payment failure or insufficient USDC balance returns 402 Payment Required

## How this service works

Call when an agent needs a blake2s256 digest of text, encoded as base64. No network and no LLM. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/digest-blake2s256-base64 first.

## Output

Returns a base64-encoded BLAKE2s-256 cryptographic digest of the provided text. The result is a deterministic, fixed-length hash string computed entirely locally (no network calls or LLM inference involved).

## 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/blake2s-256-base64-digest-8403e15e/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)