# x402-tools Asset Canon Diagnostics

> x402-tools Asset Canon Diagnostics is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).

Returns a paid JSON payload describing the canonical asset metadata for a given x402 or well-known URL, requiring $0.02 USDC via the x402 HTTP 402 payment protocol

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/assetcanon?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-asset-canon-diagnostics-41d036d5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_y0xFESaXZ7gRL5r9p_nAu

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-asset-canon-diagnostics-41d036d5
```

Example prompt: Can you run the x402 asset canon diagnostic on https://example.com/api/v1/data using a GET request and tell me what SKU, title, and price it returns?

## When to prefer this

Use this endpoint when you need to inspect, validate, or diagnose the canonical asset metadata for an x402-gated URL — particularly to confirm SKU, title, and pricing before integrating or listing a paid API. Prefer this over generic HTTP inspection tools when the target URL uses the x402 HTTP 402 payment protocol with EIP-3009 extras and requires OpenX402 facilitator compatibility.

## Known failure modes

- HTTP 402 returned if payment is missing or incorrect — includes eip3009 extras indicating required payment details
- Invalid or unreachable URL input causes lookup failure
- Non-OpenX402 facilitators are rejected — only OpenX402 is supported
- Malformed input object missing required 'type' or 'method' fields returns validation error
- Rate limiting or server errors may return 5xx responses

## How this service works

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

## Output

A JSON object containing the asset's SKU identifier, human-readable title, price denomination, and a diagnostic note. For unpaid requests the endpoint returns HTTP 402 with eip3009 payment extras; after successful $0.02 USDC payment via OpenX402 facilitator, the canonical asset metadata payload is returned.

## 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 402 or well-known URL. Defaults to this origin's Pipe Check."
      },
      "origin": {
       "type": "string",
       "description": "Public origin URL. Alias of url."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  },
  "inputSchema": {
   "type": "object",
   "required": [
    "type",
    "properties"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "object"
    },
    "required": {
     "type": "array",
     "items": {
      "type": "string"
     }
    },
    "properties": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "assetcanon",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Asset Canon"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-asset-canon-diagnostics-41d036d5/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)