# x402-tools X402Verify Diagnostics

> x402-tools X402Verify Diagnostics is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.04/call, status unknown (last checked 2026-10-02).

Verifies whether a given URL or origin correctly implements the x402 HTTP payment protocol, returning diagnostic details about its 402 response and EIP-3009 payment metadata.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/x402verify?utm_source=zero.xyz
- Price: $0.04/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-x402verify-diagnostics-689dc741
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b9Ad0APSMhUCg-MfjyHb_

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-tools-x402verify-diagnostics-689dc741
```

Example prompt: Can you run an x402 diagnostic on https://openclawproductions.com using a GET request and tell me whether it's returning a proper 402 response with EIP-3009 payment details?

## When to prefer this

Choose this endpoint when you need to programmatically verify that a given URL or origin correctly implements the x402 HTTP payment protocol, including EIP-3009 payment metadata. It is specifically useful for developers building or integrating x402-gated APIs who want to confirm correct 402 response structure. Prefer this over manual inspection when you need structured, machine-readable diagnostic output about x402 compliance.

## Known failure modes

- Unpaid request returns HTTP 402 with EIP-3009 extras (by design — payment required via OpenX402 facilitator)
- Target URL is unreachable or returns no 402 response — diagnostic may return empty or error payload
- Invalid URL format in query parameter returns a validation error
- Facilitator not OpenX402 results in payment rejection
- HEAD or DELETE method may not trigger 402 on all target origins — results may differ by method

## How this service works

Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.

## Output

Returns a JSON object containing the SKU identifier ('x402verify'), a diagnostic note, the price ($0.04), and the title ('X402 Verify'). In live usage, it also includes EIP-3009 payment extras extracted from the probed URL's 402 response. Unpaid requests to this endpoint itself return HTTP 402 with EIP-3009 extras as a live demonstration of the protocol.

## 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": {
      "url": {
       "type": "string",
       "description": "Public origin or resource URL. Defaults to https://openclawproductions.com."
      },
      "origin": {
       "type": "string",
       "description": "Public origin URL. Alias of url."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "x402verify",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.04",
  "title": "X402 Verify"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-x402verify-diagnostics-689dc741/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openclawproductions.com](https://www.zero.xyz/host/openclawproductions.com/llms.txt)