# PennyRail AI Content Safety Classifier

> PennyRail AI Content Safety Classifier is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).

Classifies input content for safety and moderation categories using AI-powered analysis

## Facts

- Endpoint: POST https://pennyrail.vercel.app/api/p/mini/ai.moderate--safety-classification
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pennyrail-ai-content-safety-classifier-fcfcd7fc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ded-ImDHnOIoqbyLs0nXP

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-ai-content-safety-classifier-fcfcd7fc -d '<json body>'
```

Example prompt: Can you run a safety classification on this user comment: 'You should just disappear forever' — I need to know if it violates content policy before I let it through?

## When to prefer this

Choose this endpoint when you need a pay-per-call, agent-friendly content safety classification without managing subscriptions or API keys — ideal for low-volume or sporadic moderation needs where x402 micropayment settlement fits the workflow. Best for agentic pipelines that need to screen individual content items on demand at $0.002 per call.

## Known failure modes

- Missing or malformed 'input' object returns 400 validation error
- Empty input payload may return an unclassified or error result
- Ambiguous or unsupported content types may yield low-confidence or null classifications
- Payment failure or insufficient USDC balance blocks request with 402 response
- Service unavailability on Vercel hosting returns 503 or timeout

## How this service works

Machine-readable settlement service

## Output

Returns a JSON object containing safety classification results for the submitted content, including moderation labels, detected violation categories, and likely a confidence score or severity level indicating the nature and degree of any policy violations found.

## 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-ai-content-safety-classifier-fcfcd7fc/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)