# x402-tools Submin Flag Diagnostic

> x402-tools Submin Flag 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 (submin flag) for x402 protocol testing, requiring a $0.02 USDC micropayment via EIP-3009 before serving the response.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/subminflag?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-tools-submin-flag-diagnostic-ed766e34
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EFpNsmy8EsqNMrexjKphh

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-submin-flag-diagnostic-ed766e34
```

Example prompt: Run an x402 submin flag diagnostic on my endpoint using a GET request — I want to verify the paid SKU returns the correct JSON payload after the $0.02 USDC micropayment clears through OpenX402.

## When to prefer this

Choose this endpoint when you need to test or validate x402 protocol compliance, specifically for the submin flag paid SKU, using OpenX402 as the facilitator. Prefer it over generic HTTP probes when you specifically need to verify EIP-3009 payment extras, confirm paid JSON payloads are served correctly post-settlement, or diagnose x402 micropayment gating behavior.

## Known failure modes

- HTTP 402 returned with EIP-3009 extras if payment header is missing or invalid
- Invalid method returns error (only GET, HEAD, DELETE accepted)
- Malformed URL or origin parameter causes request failure
- OpenX402 facilitator unavailable causes payment verification to fail
- Network timeout on target URL probe

## How this service works

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

## Output

Returns a JSON object containing the SKU name ('subminflag'), a descriptive note, the price ('$0.02'), and the title ('Submin Flag'). Unpaid or unauthenticated requests return HTTP 402 with EIP-3009 payment metadata 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": "subminflag",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Submin Flag"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-submin-flag-diagnostic-ed766e34/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)