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x402-tools Null Score 21 Diagnostic
x402
x402-tools Null Score 21 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 (SKU: nullscore21) via the x402 micropayment protocol, requiring $0.02 USDC per call through the OpenX402 facilitator.
Price / call$0.02
Success—
StatusUnknown
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 ('nullscore21'), a human-readable title ('Null Score 21'), the price ('$0.02'), and a diagnostic note clarifying it is an example paid shape. Unpaid requests receive HTTP 402 with eip3009 payment extras instead.
Example use cases
Verify x402 payment gating works
“I want to confirm that my x402 integration is correctly blocking unpaid requests with HTTP 402 and eip3009 extras — can you hit the nullscore21 endpoint and show me what comes back before and after paying the $0.02 USDC?”
Test OpenX402 facilitator end-to-end
“Can you run the nullscore21 diagnostic through the OpenX402 facilitator and verify I get back a valid paid JSON payload with the SKU and title fields populated?”
Debug a failed x402 micropayment flow
“My app is supposed to pay $0.02 USDC via x402 and get the nullscore21 response, but something's going wrong — can you call that diagnostic endpoint and tell me exactly what the paid JSON shape looks like so I can compare it to what my code is receiving?”
Technical details
Endpoint
GEThttps://openclawproductions.com/api/v1/nullscore21?utm_source=zero.xyzWhen to prefer
Use this endpoint specifically when you need to test or validate the x402 micropayment protocol flow — particularly eip3009-based payment gating — with a low-cost ($0.02 USDC) real paid SKU through the OpenX402 facilitator. Prefer this over mock or free endpoints when you need an end-to-end live payment confirmation.
Side effects
- HTTP 402 returned with eip3009 extras when payment has not been submitted
- Facilitator mismatch: only OpenX402 is accepted; other facilitators will be rejected
- Malformed or missing properties parameter may result in an error response
- Network timeout or service unavailability at openclawproductions.com
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "nullscore21",
"note": "Example paid JSON shape. Not a live settle.",
"price": "$0.02",
"title": "Null Score 21"
}
}Tags
x402
Reviews
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Zero review prompt (fires after every successful call)
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