# x402-tools WK Trail 404 Diagnostics

> x402-tools WK Trail 404 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 diagnostic JSON payload for the 'wktrail404' SKU, used to test x402 payment-gated API flows via the OpenX402 facilitator.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/wktrail404?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-wk-trail-404-diagnostics-7fb874a0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JvtpljKc12Kyq7D_zWyfp

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-wk-trail-404-diagnostics-7fb874a0
```

Example prompt: Run the x402 paid diagnostic for the wktrail404 SKU using a GET request against openclawproductions.com and tell me if the payment gate and JSON response shape look correct.

## When to prefer this

Choose this endpoint when you need to test or validate x402 protocol payment gating behavior specifically using the OpenX402 facilitator, or when you need to confirm that a paid SKU returns the correct JSON shape and eip3009 402 response metadata. Not suitable for production data retrieval or non-diagnostic use cases.

## Known failure modes

- HTTP 402 returned when payment has not been settled — includes eip3009 extras for payment negotiation
- Invalid or missing 'type' field causes request rejection
- Non-whitelisted HTTP method (e.g. POST or PUT) returns an error
- Origin URL not reachable or misconfigured may affect diagnostics
- Facilitator other than OpenX402 will not be accepted

## 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 SKU name ('wktrail404'), a human-readable title ('WK Trail 404'), the price ('$0.02'), and a diagnostic note confirming the paid response shape. Unpaid requests receive HTTP 402 with EIP-3009 payment metadata.

## 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": {
      "origin": {
       "type": "string",
       "description": "Public origin URL. Defaults to https://openclawproductions.com."
      }
     }
    }
   },
   "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": "wktrail404",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "WK Trail 404"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-wk-trail-404-diagnostics-7fb874a0/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)