# x402-tools sampfree200 Paid Diagnostics Endpoint

> x402-tools sampfree200 Paid Diagnostics Endpoint 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 x402 diagnostic JSON response for the sampfree200 SKU, gated behind a $0.02 USDC micropayment via the x402/EIP-3009 protocol.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/sampfree200?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-sampfree200-paid-diagnostics-endpoint-16d88953
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rMLh79F9BWPt1YF5wQPCX

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-sampfree200-paid-diagnostics-endpoint-16d88953
```

Example prompt: Run an x402 diagnostic GET probe on my endpoint URL to check if it's returning the correct HTTP 402 and eip3009 payment extras — use the sampfree200 SKU and pay the $0.02 USDC fee to get back the live diagnostic result.

## When to prefer this

Use this endpoint when you need to test, validate, or debug an x402 micropayment-gated API endpoint, specifically to verify that HTTP 402 responses and EIP-3009 payment extras are correctly implemented. Prefer this over generic HTTP probes when you need x402-protocol-aware diagnostics and are using the OpenX402 facilitator.

## Known failure modes

- HTTP 402 returned with eip3009 extras if payment header is missing or invalid
- Invalid URL input causes probe to fail or return error
- Non-GET/HEAD/DELETE method rejected by input schema
- Facilitator not OpenX402 will result in payment rejection
- Malformed origin/url query parameter returns error

## 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 ('sampfree200'), a human-readable title ('Samp Free 200'), the price ('$0.02'), and a diagnostic note. Unpaid requests receive an HTTP 402 response with EIP-3009 payment extras instead.

## 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": "sampfree200",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Samp Free 200"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-sampfree200-paid-diagnostics-endpoint-16d88953/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)