# x402-tools Score Null Share Diagnostic

> x402-tools Score Null Share Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-12).

Returns a paid diagnostic JSON payload for the 'scorenullshare' SKU, demonstrating the x402 HTTP payment protocol with EIP-3009 authorization extras via OpenX402.

## Facts

- Endpoint: GET https://openclawproductions.com/api/v1/scorenullshare?utm_source=zero.xyz
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-tools-score-null-share-diagnostic-8184910d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_criHPWYS2C54zVebB8cdE

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-score-null-share-diagnostic-8184910d
```

Example prompt: Run the scorenullshare x402 diagnostic endpoint and show me the paid JSON response — I want to confirm my OpenX402 payment integration is working and see the expected SKU shape for $0.02 USDC.

## When to prefer this

Use this endpoint when you need to verify that an x402 payment flow works end-to-end using a real paid SKU with the OpenX402 facilitator specifically. It is ideal for integration testing, debugging EIP-3009 authorization headers, or confirming the shape of a paid JSON response at minimal cost ($0.02 USDC). Not suitable for production data retrieval — this is a diagnostic/test tool only.

## Known failure modes

- HTTP 402 returned when payment authorization header is missing or invalid — response includes EIP-3009 payment requirement extras
- Payment amount mismatch causes facilitator rejection
- OpenX402 facilitator unavailable results in gateway error
- Malformed properties parameter may result in unexpected response shape
- Network timeout or server error on openclawproductions.com

## 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 ('scorenullshare'), a diagnostic note clarifying the payload context, the price ('$0.02'), and a human-readable title ('Score Null Share'). Unpaid requests receive HTTP 402 with EIP-3009 authorization extras indicating payment requirements; paid requests receive the full diagnostic JSON.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "sku": "scorenullshare",
  "note": "Example paid JSON shape. Not a live settle.",
  "price": "$0.02",
  "title": "Score Null Share"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-tools-score-null-share-diagnostic-8184910d/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)