# x402-tools Method Probe

> x402-tools Method Probe is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-02).

Probes a public URL using a specified HTTP method (GET, HEAD, or DELETE) to diagnose x402 payment-gated endpoints, returning structured diagnostics about the 402 response and EIP-3009 payment requirements.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/methodprobe?utm_source=zero.xyz
- Price: $0.03/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-method-probe-96bf333d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vzwxb4lq6V3A895Og1JNl

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-method-probe-96bf333d
```

Example prompt: Use the x402 Method Probe to check what payment requirements come back when you do a GET request against https://example.com/api/paid-endpoint — I want to see the EIP-3009 extras and 402 details.

## When to prefer this

Choose this endpoint when you need to diagnose or audit x402-protocol-gated HTTP endpoints specifically — particularly to inspect EIP-3009 payment metadata, validate 402 response structure, or debug micropayment failures. It is purpose-built for the x402 ecosystem with OpenX402 as facilitator. Prefer it over generic HTTP probing tools when the target is a payment-gated API and you need structured payment metadata in the response.

## Known failure modes

- HTTP 402 returned when payment header is missing or invalid — expected behavior for unpaid calls
- Invalid method enum (only GET, HEAD, DELETE accepted) causes request rejection
- Target URL is unreachable or returns non-402 response — probe may return unexpected diagnostic data
- OpenX402 facilitator unavailable — payment settlement fails
- Malformed URL in query params causes input validation 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, human-readable title, price (e.g. '$0.03'), and any EIP-3009 payment extras attached to the 402 response for the probed URL and method combination. On unpaid requests, returns HTTP 402 with payment metadata; on paid requests, returns the full diagnostic payload.

## 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"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "methodprobe",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.03",
  "title": "Method Probe"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-method-probe-96bf333d/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)