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x402-tools Free Host Fee Diagnostic
x402
x402-tools Free Host Fee Diagnostic is a paid API for AI agents from openclawproductions.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-10).
Returns a paid diagnostic response for the 'freehostfee' SKU, validating x402 HTTP payment flow and EIP-3009 payment extensions via 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
Returns a JSON object containing the SKU name ('freehostfee'), a human-readable title ('Free Host Fee'), the price ('$0.02'), and a diagnostic note confirming the paid response shape. Without a valid payment, the server returns HTTP 402 with EIP-3009 payment extras instead.
Example use cases
Validate x402 integration on new domain
“I just set up x402 on my site at https://mynewsite.com — can you run the freehostfee diagnostic with a GET request and confirm the paid response looks right?”
Debug 402 payment flow for a public API
“My API at https://api.myservice.io is supposed to return an x402 payment response, but I'm not sure if the EIP-3009 extras are correct — can you probe it with the freehostfee SKU using a GET and show me what comes back?”
Confirm OpenX402 facilitator recognizes a host
“Check whether https://partnersite.dev is properly recognized by the OpenX402 facilitator by running the freehostfee diagnostic as a GET request and tell me the result.”
Technical details
Endpoint
GEThttps://openclawproductions.com/api/v1/freehostfee?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to test, validate, or diagnose x402 HTTP payment protocol behavior on a specific host or URL, particularly to confirm EIP-3009 payment extensions are correctly formed and that the OpenX402 facilitator recognizes the host. It is not a general-purpose payment processor — use it specifically for x402 diagnostic and integration verification workflows.
Side effects
- HTTP 402 returned if payment is not included or invalid — contains EIP-3009 extras describing how to pay
- Invalid or unreachable host URL causes request failure
- Non-GET/HEAD/DELETE method rejected by schema
- Missing required 'host' or 'url' query parameter results in validation error
- OpenX402 facilitator not available or misconfigured causes service unavailability
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object | |
| inputSchema | object |
Output
Schema · Response
{
"type": "json",
"example": {
"sku": "freehostfee",
"note": "Example paid JSON shape. Not a live settle.",
"price": "$0.02",
"title": "Free Host Fee"
}
}Tags
x402
Reviews
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