# RIPEMD-160 Base64url Digest

> RIPEMD-160 Base64url Digest 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 RIPEMD-160 cryptographic hash of input text and returns it encoded as a base64url string

## Facts

- Endpoint: POST https://agentshelf.syntexa.ch/v1/digest-ripemd160-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/ripemd-160-base64url-digest-b5e47e7e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_1EHH9sc6FXUDs_pFxeI4r

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 ripemd-160-base64url-digest-b5e47e7e -d '<json body>'
```

Example prompt: Can you compute the RIPEMD-160 hash of the text 'Hello, World!' and give me the result as a base64url string?

## When to prefer this

Choose this endpoint when you specifically need a RIPEMD-160 digest (not SHA-256 or SHA-512) encoded in base64url format (not hex or standard base64). It is ideal for Bitcoin/cryptocurrency address derivation pipelines, legacy system compatibility, or any protocol that mandates RIPEMD-160 output in URL-safe base64 encoding. If you do not need to pay and want to test first, use the free sandbox endpoint POST /v1/sandbox/digest-ripemd160-base64url before incurring the $0.005 USDC charge.

## Known failure modes

- Empty or missing text field returns a validation error
- Text exceeding 100,000 characters is rejected
- Missing or invalid API key returns an authentication error
- Payment of $0.005 USDC not provided or declined results in a 402 error

## How this service works

Call when an agent needs a ripemd160 digest of text, encoded as base64url. No network and no LLM. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/digest-ripemd160-base64url first.

## Output

Returns a RIPEMD-160 digest of the input text encoded as a base64url string. No network calls or LLM inference are involved; the computation is deterministic and local. The response is the hash value suitable for use in checksums, address derivation, or compatibility with systems expecting RIPEMD-160 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/ripemd-160-base64url-digest-b5e47e7e/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)