# PennyRail URL Domain Settlement Node

> PennyRail URL Domain Settlement Node is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).

Accepts a URL domain string input and returns a machine-readable settlement response via the x402 micropayment protocol

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/nano/url.domain--url-domain?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-url-domain-settlement-node-bb747939
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DxeDgYhuFfE1e9-wimwJ2

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-url-domain-settlement-node-bb747939 -d '<json body>'
```

Example prompt: Submit the domain 'example.com' to the PennyRail settlement node for machine-readable processing — it costs a fraction of a cent via x402 micropayment.

## When to prefer this

Choose this endpoint when you need to programmatically settle a micropayment (via the x402 protocol) tied to a URL domain string and receive a machine-readable response. It is suited for AI agent pipelines that need to unlock domain-gated resources for fractions of a cent in USDC. Prefer alternatives if you need human-readable output, bulk batch processing, or a domain lookup without a financial transaction component.

## Known failure modes

- Payment failure or insufficient USDC balance results in a 402 Payment Required response
- Invalid or malformed input string may return a 400 Bad Request
- Missing required 'input' field in request body causes schema validation error
- Network or Vercel hosting downtime results in 5xx errors
- Domain string not recognized by the settlement logic may return an empty or error payload

## How this service works

Machine-readable settlement service

## Output

An open-schema JSON object returned after settlement processing; the exact fields vary (additionalProperties: true) but represent a machine-readable confirmation or resource payload tied to the submitted URL domain.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pennyrail-url-domain-settlement-node-bb747939/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)