# Ontario Protocol x402 Implementation Audit

> Ontario Protocol x402 Implementation Audit is a paid API for AI agents from ontarioprotocol.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Audits an x402 endpoint or repository for HTTP 402 compliance, manifest correctness, pricing configuration, and payment readiness before an agent or developer pays or deploys.

## Facts

- Endpoint: POST https://ontarioprotocol.com/api/x402/implementation-audit
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ontario-protocol-x402-implementation-audit-4bd841a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YimkWieSQiNf-YZoY8Gv7

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 ontario-protocol-x402-implementation-audit-4bd841a0 -d '<json body>'
```

Example prompt: Run an x402 implementation audit on https://myapi.example.com/paid-endpoint and focus on launch readiness — I want to make sure the HTTP 402 responses, manifests, and pricing are all correct before I go live.

## When to prefer this

Use this endpoint when you need to verify that an x402-compliant paid API or repository is correctly implementing the HTTP 402 payment protocol before going live or before an agent attempts to pay. It is specifically designed for x402 protocol validation and is the right choice over generic HTTP testers or linters because it understands x402 manifests, pricing headers, and agent-discovery semantics natively.

## Known failure modes

- Endpoint URL is not publicly reachable — audit cannot fetch 402 response
- Repository URL is private or does not exist — code inspection fails
- Endpoint does not return HTTP 402 at all — audit flags as non-compliant
- Invalid URI format for endpoint_url or repository_url — validation error returned
- Endpoint is behind authentication — audit tools cannot probe correctly
- Rate limiting or firewall on target URL blocks audit requests

## How this service works

Find the first reason agents are not buying your x402 API. Test HTTP 402 readiness, Coinbase Bazaar retrieval, buyer-task fit, and agent payment policy free.

## Output

Returns a structured audit report (schema: ontario.x402_implementation_audit.v1) with a status field and findings covering the requested focus area — which may include HTTP 402 response correctness, payment manifest validity, pricing configuration accuracy, endpoint discoverability signals, and security posture. The report identifies specific issues and readiness gaps so developers can fix problems before deployment or agent usage.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "focus": {
   "enum": [
    "launch",
    "payment",
    "discovery",
    "security"
   ],
   "type": "string",
   "default": "launch"
  },
  "endpoint_url": {
   "type": "string",
   "format": "uri",
   "description": "Public HTTPS x402 endpoint to inspect."
  },
  "repository_url": {
   "type": "string",
   "format": "uri",
   "description": "Public GitHub repository containing the x402 implementation."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "schema": "ontario.x402_implementation_audit.v1",
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ontario-protocol-x402-implementation-audit-4bd841a0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ontarioprotocol.com](https://www.zero.xyz/host/ontarioprotocol.com/llms.txt)