# x402 Validator — Strict-v2 Conformance Auditor

> x402 Validator — Strict-v2 Conformance Auditor is a paid API for AI agents from x402-validator-tools.onrender.com, paid per call via x402, $0.02/call, status down (last checked 2026-10-02).

Audits any x402 merchant endpoint URL for strict-v2 protocol conformance, returning per-check pass/fail results with optional AI remediation advice

## Facts

- Endpoint: POST https://x402-validator-tools.onrender.com/validate?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: down
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-validator-strict-v2-conformance-auditor-fdfd6c7b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-rgNF3erpP9oMxn26MC6Y

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-validator-strict-v2-conformance-auditor-fdfd6c7b -d '<json body>'
```

Example prompt: Can you audit https://shop.example.com/pay to check if it passes strict x402 v2 conformance, and attach AI remediation advice if anything fails?

## When to prefer this

Choose this endpoint when you need authoritative strict-v2 x402 protocol conformance checking against a live merchant URL, especially when you want structured per-check diagnostics or AI-powered remediation guidance. Prefer this over manual inspection or generic HTTP testing tools when the target is specifically an x402 payment endpoint and you need CAIP-2, manifest, and JSON schema checks in a single call.

## Known failure modes

- Invalid or unreachable target URL returns an error or failed checks
- Target endpoint not implementing x402 at all results in wholesale failure across all checks
- AI advice/explain fields are null if DASHSCOPE_API_KEY is not configured server-side
- Slow or timing-out merchant endpoints may affect the ~580ms latency guarantee
- Malformed URL input causes a 422 or equivalent validation error

## How this service works

Audit any x402 merchant endpoint for strict-v2 conformance in ~580 ms. Live demo, no signup · Free, Pro ($9/mo), Enterprise ($49/mo). Hosted by Gael L Chulim.

## Output

Returns an object with overall pass/fail status, a summary string, a timestamped array of individual check results (each with name, status, message, and optional details object), latency in ms, and optionally an AI-generated remediation advice string and a plain-language AI summary for non-experts.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string",
   "description": "Target merchant URL to audit (http or https)"
  },
  "mode": {
   "type": "string",
   "description": "standard | marketplace"
  },
  "advise": {
   "type": "boolean",
   "description": "Attach Qwen AI remediation advice (requires DASHSCOPE_API_KEY server-side)"
  },
  "explain": {
   "type": "boolean",
   "description": "Attach a plain-language AI summary of the result for non-experts (requires DASHSCOPE_API_KEY server-side)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "title": "ValidateResponse",
 "required": [
  "url",
  "overall",
  "summary",
  "checks",
  "timestamp"
 ],
 "properties": {
  "url": {
   "type": "string",
   "title": "Url"
  },
  "checks": {
   "type": "array",
   "items": {
    "type": "object",
    "title": "CheckResultItem",
    "required": [
     "name",
     "status",
     "message"
    ],
    "properties": {
     "name": {
      "type": "string",
      "title": "Name"
     },
     "status": {
      "type": "string",
      "title": "Status"
     },
     "details": {
      "anyOf": [
       {
        "type": "object",
        "additionalProperties": true
       },
       {
        "type": "null"
       }
      ],
      "title": "Details"
     },
     "message": {
      "type": "string",
      "title": "Message"
     }
    },
    "description": "One check result, flattened for JSON consumers."
   },
   "title": "Checks"
  },
  "overall": {
   "type": "string",
   "title": "Overall"
  },
  "summary": {
   "type": "string",
   "title": "Summary"
  },
  "ai_advice": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "null"
    }
   ],
   "title": "Ai Advice"
  },
  "timestamp": {
   "type": "string",
   "title": "Timestamp"
  },
  "ai_summary": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "null"
    }
   ],
   "title": "Ai Summary"
  },
  "latency_ms": {
   "anyOf": [
    {
     "type": "number"
    },
    {
     "type": "null"
    }
   ],
   "title": "Latency Ms"
  }
 },
 "description": "Audit response."
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-validator-strict-v2-conformance-auditor-fdfd6c7b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-validator-tools.onrender.com](https://www.zero.xyz/host/x402-validator-tools.onrender.com/llms.txt)