# PennyRail JSON Path Reader

> PennyRail JSON Path Reader is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status down (last checked 2026-10-31).

Reads a value at a specified dot-notation path from a JSON object via a paid settlement API

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/nano/json.get--read-dot-path?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: down
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-json-path-reader-4dc437a3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mghk2HZBny-bPVftKZ9N0

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-json-path-reader-4dc437a3 -d '<json body>'
```

Example prompt: Read the value at the dot-notation path 'user.address.city' from this JSON object: {"user":{"address":{"city":"Austin","zip":"78701"}}}

## When to prefer this

Use this endpoint when you need a lightweight, pay-per-call JSON path extraction service without setting up a full data-processing pipeline. Ideal for agents that occasionally need to pull a specific nested field from JSON payloads and want a simple, stateless micro-service with per-call micro-pricing via USDC.

## Known failure modes

- Invalid or malformed JSON input causes a parsing error
- Requested dot-notation path does not exist in the provided object, returning null or empty
- Missing required 'input' field results in a 400-level error
- Network or payment settlement failure from the x402 micro-payment layer
- Deeply nested or large JSON objects may time out or exceed size limits

## How this service works

Machine-readable settlement service

## Output

Returns the value found at the specified dot-notation path within the provided JSON input object, as a JSON object with the extracted result. If the path does not exist, the response may return null or an error indicator.

## 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-json-path-reader-4dc437a3/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)