# 402Check — x402 Endpoint Audits for Agents

> 402Check — x402 Endpoint Audits for Agents is a paid API for AI agents from agent-json-utility.pablovph.chatgpt.site, paid per call via x402, $20/call, status unknown (last checked 2026-09-14).

Audits a public HTTPS origin for x402 payment protocol compliance and agent-discovery compatibility, returning a scored report with findings and prioritized fixes.

## Facts

- Endpoint: POST https://agent-json-utility.pablovph.chatgpt.site/v1/launch-report
- Price: $20/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/402check-x402-endpoint-audits-for-agents-a961bfac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NHc8GaS724-Cy_ip7QB44

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 402check-x402-endpoint-audits-for-agents-a961bfac -d '<json body>'
```

Example prompt: Can you run an x402 audit on https://api.myservice.com and give me a readiness score with a list of what I need to fix before launch?

## When to prefer this

Choose this endpoint when you need a structured, scored compliance report specifically for the x402 payment protocol — especially before listing an endpoint on a facilitator or agent marketplace like bazaar. It goes beyond a simple HTTP probe by also checking OpenAPI discoverability, route-level runtime probes, and returning actionable prioritized fixes, making it ideal for developers preparing to launch or debug x402-compatible paid APIs.

## Known failure modes

- Origin URL is not publicly reachable — audit cannot fetch OpenAPI spec or probe routes
- Origin has no x402 routes — report returns zero paidRoutes and a low score
- OpenAPI document is malformed or inaccessible — openapi finding fails with severity:error
- TLS/HTTPS issues on the target origin cause probe failures
- Rate limiting or firewall on the target origin blocks the audit probes
- Invalid URI format passed as origin — request rejected with validation error

## How this service works

Audit any x402 payment endpoint for protocol and discovery compatibility.

## Output

Returns a JSON object with a boolean 'ready' flag, a numeric score (0–100), the audited origin, a human-readable summary, an array of findings (each with an id, passed status, message, and severity), the count of paid routes found, per-endpoint audit details, and a prioritized list of fixes to address before launch.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "origin": {
   "type": "string",
   "format": "uri",
   "description": "Public HTTPS origin whose OpenAPI and x402 routes should be audited"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ready": true,
  "score": 94,
  "origin": "https://api.example.com",
  "summary": "Launch-ready: two paid routes passed discovery and runtime probes.",
  "findings": [
   {
    "id": "openapi",
    "passed": true,
    "message": "OpenAPI 3.1 document is public and parseable",
    "severity": "error"
   }
  ],
  "paidRoutes": 2,
  "endpointAudits": [],
  "prioritizedFixes": []
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/402check-x402-endpoint-audits-for-agents-a961bfac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-json-utility.pablovph.chatgpt.site](https://www.zero.xyz/host/agent-json-utility.pablovph.chatgpt.site/llms.txt)