Resolve AI API Payment Failure

I’m unable to top-up credits for my Claude AI API account. Every attempt made with a standard credit or debit card simply ends in silence—no decline notice, no gateway error, nothing at all—so I can’t tell whether the fault sits in my checkout flow, the payment processor, or a subtle mis-configuration in the Claude billing portal.

Here’s what I know so far
• Issue: payment never completes; credits are not added.
• Method: credit/debit card only (no PayPal or bank transfer involved).
• Error feedback: none displayed on screen or in the network console.

What I need from you
1. Trace the transaction path, isolate the exact failure point, and explain why the card charge isn’t initiated or returned.
2. Implement or guide the fix—whether that means adjusting the API request, tweaking Stripe/Checkout.com settings, or renewing any required webhooks or SSL settings.
3. Prove the solution with at least one successful, fully settled credit purchase, then provide a concise hand-over note so I can repeat the process confidently.

You’ll get API keys, limited account access, and any payment gateway dashboards necessary as soon as we start. Experience with SaaS billing flows, card tokenization, and Claude (or similar) AI credit systems will make the job quick; clear communication and pragmatic debugging are what count most.

Looking forward to having this sorted fast so I can keep building with Claude uninterrupted.