# x402 Inspector

> x402 Inspector is a paid API for AI agents from x402-inspector.kaisergrokbot.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).

Decodes and audits an x402 paid API endpoint's 402 challenge to reveal the real price, asset, network, and payee, and flags risks before an agent pays.

## Facts

- Endpoint: GET https://x402-inspector.kaisergrokbot.workers.dev/api/deep?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-inspector-346c9b80
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_W6txvRU5yUmO03wZ9JXiq

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 x402-inspector-346c9b80
```

Example prompt: Before paying, inspect this x402 endpoint for me — https://api.example.com/data — using a GET request, and tell me the real price, who gets paid, which network and asset it uses, and any risk flags you find.

## When to prefer this

Use this endpoint whenever an AI agent or developer encounters an unknown x402 paid API and needs to verify the payment details and safety before authorizing a micropayment. It is the right choice when you want to decode what a 402 challenge actually demands (price, asset, network, payee) and surface any anomalies, especially when the endpoint is from an untrusted or unfamiliar source.

## Known failure modes

- URL does not return a 402 response — endpoint may not be an x402 API
- Network timeout reaching the target endpoint
- Malformed or non-standard 402 challenge that cannot be decoded
- Invalid URL format provided
- Target endpoint blocks inspection requests

## How this service works

Free checker for x402 paid API endpoints: decodes the 402 challenge, shows the real price, asset, network and payee, and flags risks before your agent pays.

## Output

A JSON object containing the decoded 402 challenge details: the actual price amount, payment asset (e.g. USDC), blockchain network, payee wallet address, and any identified risk flags or anomalies that should be reviewed before authorizing payment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "url": {
   "type": "string",
   "description": "x402 endpoint URL to inspect"
  },
  "method": {
   "enum": [
    "GET",
    "POST"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-inspector-346c9b80/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-inspector.kaisergrokbot.workers.dev](https://www.zero.xyz/host/x402-inspector.kaisergrokbot.workers.dev/llms.txt)