# x402 Launch Audit API

> x402 Launch Audit API is a paid API for AI agents from x402.167-172-95-184.nip.io, paid per call via x402, $1/call, status unknown (last checked 2026-10-01).

Returns a scored audit report with prioritized fixes for x402 protocol integration, including discovery, Bazaar indexing, paid-route gating, and receipt discipline

## Facts

- Endpoint: GET https://x402.167-172-95-184.nip.io/audit/x402?utm_source=zero.xyz
- Price: $1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-launch-audit-api-5b0f242b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yyQmnSm4FJh1vnUVfEqjg

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-launch-audit-api-5b0f242b
```

Example prompt: Run an x402 launch audit on my API and give me a score plus a ranked list of concrete fixes — I want to know if my Bazaar indexing, paid-route gating, and facilitator calls are set up correctly.

## When to prefer this

Use this endpoint when you need a structured, scored diagnostic of an x402 integration specifically — covering Bazaar indexing readiness, paid-route gating correctness, facilitator call history, and buyer-agent copy quality. Prefer this over manual checklist review when you want machine-readable findings with severity rankings and actionable fixes.

## Known failure modes

- Payment not received — returns HTTP 402 requiring USDC payment on Base via x402 protocol
- No settled facilitator call yet — audit may flag this as a high-severity finding rather than failing
- Ephemeral tunnel URL instability — the nip.io domain may be unreachable if the underlying IP changes
- Malformed payment header — x402 payment verification fails, returning 402 or 400

## How this service works

Agent-commerce trust/audit API for x402 challenge correctness, receipts, replay/context binding, failed payout triage, mandate readiness, and MCP/A2A discoverability.

## Output

A JSON object containing a numeric score (0-100), the network (e.g. 'base'), product label, price in USD, timestamp, and an array of findings each with an item description, severity (high/medium/low), and a specific recommended fix action.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "score": 87,
  "network": "base",
  "product": "x402 Launch Audit",
  "findings": [
   {
    "fix": "Run one funded x402 v2 payment so Bazaar can index the resource after settle.",
    "item": "No settled facilitator call yet",
    "severity": "high"
   },
   {
    "fix": "Move to a permanent HTTPS domain before broad distribution.",
    "item": "Ephemeral tunnel URL",
    "severity": "medium"
   }
  ],
  "price_usd": "1.00",
  "timestamp": 1780000000
 },
 "description": "A compact one-dollar x402 launch audit with concrete fixes for discovery, Bazaar indexing, paid-route gating, buyer-agent copy, and receipt discipline."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-launch-audit-api-5b0f242b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.167-172-95-184.nip.io](https://www.zero.xyz/host/x402.167-172-95-184.nip.io/llms.txt)