# x402-tools Screener

> x402-tools Screener is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).

Paid diagnostic screener endpoint using x402 micropayment protocol, returning HTTP 402 with EIP-3009 payment details on unpaid requests

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/screener?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-screener-c3b01063
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7NpVmHypq9_hqGL694TZ9

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-screener-c3b01063
```

Example prompt: Run an x402 diagnostic screener against a GET request to check how the OpenX402 facilitator responds — I want to see the 402 payment challenge with EIP-3009 extras for an unpaid call.

## When to prefer this

Choose this endpoint when you need to test, diagnose, or validate x402 micropayment protocol flows — specifically to inspect real 402 responses with EIP-3009 extras from the OpenX402 facilitator. Ideal for developers building or debugging x402-compatible clients, wallets, or payment agents that need a live reference endpoint for payment challenge inspection.

## Known failure modes

- Unpaid request returns HTTP 402 with EIP-3009 payment challenge — expected behavior, not an error
- Invalid or missing 'type' or 'method' fields in input cause request rejection
- Unsupported method values (outside GET/HEAD/DELETE/POST enum) result in validation error
- OpenX402 facilitator unavailable causes payment verification failure
- Malformed payment token leads to 402 re-challenge

## How this service works

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

## Output

On unpaid requests: an HTTP 402 response body containing EIP-3009 payment extras and payment requirements enforced by the OpenX402 facilitator. On paid requests (with valid x402 payment): diagnostic screening results for the submitted HTTP request type and method.

## 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": {
    "body": {
     "type": "object"
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE",
      "POST"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  },
  "inputSchema": {
   "type": "object"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-screener-c3b01063/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)