# PennyRail Skill Locale Brief

> PennyRail Skill Locale Brief is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-23).

Returns a brief, machine-readable summary of a proven skill locale resource, delivered as a paid settlement service via x402.

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/skill/locale.brief--proven-skill-locale-brief?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-23
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-skill-locale-brief-aff228b0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_l_-FMudB0e4Upzr4aSPs0

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-skill-locale-brief-aff228b0 -d '<json body>'
```

Example prompt: Can you fetch the brief for the proven skill locale using PennyRail's settlement service and give me the machine-readable summary?

## When to prefer this

Choose this endpoint when you need a compact, machine-readable brief about a specific proven skill locale and are operating in an x402-compatible payment environment. It is best suited for agents that already handle micropayment flows and need lightweight skill locale metadata without a full schema.

## Known failure modes

- Missing or malformed 'input' object returns a 400-level error
- Insufficient payment or failed x402 settlement returns a 402 Payment Required error
- Unknown or invalid skill locale identifier may return an empty or error response
- Service unavailability on Vercel returns a 503 or timeout

## How this service works

Machine-readable settlement service

## Output

A machine-readable JSON object containing a brief summary or metadata about the specified proven skill locale, returned after a successful x402 micropayment settlement of $0.05 USDC.

## 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-skill-locale-brief-aff228b0/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)