Paste any x402 service URL. We test it right now and tell you exactly what's working and what's not.
Try an example:
Is the service reachable and returning 402 Payment Required?
Is the payment-required header valid base64-encoded JSON?
Is the resource URL HTTPS? (http:// causes silent failures)
Are the payment fields complete — scheme, network, payTo, amount?
Is the x402Version field present?
How fast does it respond? Anything over 2 seconds is slow.