# x402-tools Sig Alias Diagnostic

> x402-tools Sig Alias Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-14).

Returns a paid diagnostic response for the 'sigalias' SKU, verifying x402 payment flow and EIP-3009 authorization mechanics for a given URL or origin.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/sigalias?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-sig-alias-diagnostic-24ec9bde
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5d2W7Qo4Cn_HKo2kIb-yw

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-sig-alias-diagnostic-24ec9bde
```

Example prompt: Run the x402 sigalias diagnostic on https://example.com to check if the payment gating is set up correctly and show me the response shape.

## When to prefer this

Use this endpoint when you need to verify or debug x402 payment protocol compliance for a specific URL or origin, especially when working with OpenX402 as the facilitator. It is purpose-built for x402 diagnostics rather than general HTTP inspection or payment processing.

## Known failure modes

- HTTP 402 returned if payment is not included — response will contain EIP-3009 payment authorization extras
- Invalid or unreachable URL in query parameters returns an error
- Unsupported HTTP method (only GET, HEAD, DELETE allowed) returns a validation error
- Non-x402-compatible origin URL may return unexpected diagnostic output

## 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 ('sigalias'), a diagnostic note, the price ($0.03), and a title field confirming the paid response shape. Unpaid requests return HTTP 402 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"
    }
   }
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    }
   }
  },
  "inputSchema": {
   "type": "object"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-sig-alias-diagnostic-24ec9bde/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)