# PennyRail UUID Generator

> PennyRail UUID Generator is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).

Generates a new universally unique identifier (UUID) via a paid micro-settlement API endpoint

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/nano/utility.uuid-generate--uuid
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-uuid-generator-46f8c69a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DPgbSG9ejo4JuVT8ywQQ5

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 pennyrail-uuid-generator-46f8c69a -d '<json body>'
```

Example prompt: Generate a fresh UUID for me — I need a new unique identifier to assign to this record.

## When to prefer this

Choose this endpoint when you need a UUID generated as a paid micro-service via x402 settlement, particularly in agentic workflows where all utility calls are routed through a single monetized API mesh. Useful when you cannot or prefer not to generate UUIDs client-side and want a server-authoritative unique ID with an audit trail via payment.

## Known failure modes

- Payment failure: x402 payment of $0.001 USDC not completed or rejected, resulting in 402 response
- Malformed input: input object not provided in the required format
- Service unavailability: Vercel deployment down or cold-start timeout
- Rate limiting: too many requests in a short period

## How this service works

Machine-readable settlement service

## Output

Returns a UUID string — a globally unique, randomly generated identifier suitable for use as a primary key, correlation ID, or unique tag in any system.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennyrail-uuid-generator-46f8c69a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from pennyrail.vercel.app](https://www.zero.xyz/host/pennyrail.vercel.app/llms.txt)