# x402 PayTo EIP-55 Diagnostic

> x402 PayTo EIP-55 Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-11).

Returns a paid diagnostic JSON payload for the PayTo EIP-55 SKU, testing x402 payment flow with EIP-3009 authorization extras via OpenX402 facilitator.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/paytoeip55?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-payto-eip-55-diagnostic-6f20f6b9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jWUG2nu3Ckw1D_wFePLy8

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-payto-eip-55-diagnostic-6f20f6b9
```

Example prompt: Run a PayTo EIP-55 x402 diagnostic against my origin at https://myapp.example.com using a GET request — I want to confirm the payment wall is returning the right 402 response with eip3009 extras before I go live.

## When to prefer this

Choose this endpoint when you need to test, validate, or diagnose an x402 payment-gated API endpoint specifically using the PayTo EIP-55 SKU and the OpenX402 facilitator. It is ideal for confirming that HTTP 402 responses include correct EIP-3009 authorization metadata, verifying the paid JSON response shape, or debugging x402 integration before production deployment. Prefer this over generic HTTP probers when the x402 protocol and EIP-3009 payment extras are the specific subject of investigation.

## Known failure modes

- HTTP 402 returned if payment has not been made — expected behavior for unpaid requests, includes eip3009 payment extras
- Invalid or unreachable URL provided returns an error or empty diagnostic
- Non-GET/HEAD/DELETE HTTP methods rejected by input schema validation
- OpenX402 facilitator unavailable causes payment authorization to fail
- Malformed origin/url query parameter results in probe failure

## 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 ('paytoeip55'), a human-readable title ('PayTo EIP-55'), price ('$0.02'), and a diagnostic note confirming the paid response shape. Unpaid requests receive HTTP 402 with EIP-3009 payment authorization 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": "paytoeip55",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "PayTo EIP-55"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-payto-eip-55-diagnostic-6f20f6b9/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)