# PennyRail URL/Domain Resource Node

> PennyRail URL/Domain Resource Node is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status down (last checked 2026-10-23).

Accepts a URL or domain string as 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--hostname-from-url?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-url-domain-resource-node-ddee65d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_GlEIYx-Pb8-levihnkecb

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-resource-node-ddee65d7 -d '<json body>'
```

Example prompt: Can you run 'https://example.com' through PennyRail's URL resource node and get back the machine-readable settlement data for that domain?

## When to prefer this

Choose this endpoint when you need a pay-per-call, machine-readable lookup of a URL or domain resource and are already operating within an x402 micropayment workflow. It is well-suited for automated agent pipelines that need lightweight, per-call pricing at $0.001 USDC. Prefer it over free alternatives when payment-gated data access or x402-compatible settlement is a requirement.

## Known failure modes

- Payment failure or insufficient USDC balance causing 402 response
- Invalid or malformed URL/domain input returning an error
- Empty or null input field causing schema validation failure
- Upstream resolution failure returning empty or error payload
- Rate limiting or quota errors from the Vercel-hosted service
- Unstructured or unexpected response shape due to open additionalProperties schema

## How this service works

Machine-readable settlement service

## Output

A JSON object with arbitrary key-value fields (additionalProperties: true) representing machine-readable settlement or resource data associated with the submitted URL or domain. The exact shape of the response depends on the resolved resource and may vary per call.

## 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-resource-node-ddee65d7/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)