API & DevAnswered

I just created an API key but credit charging isn't working

Anonymous8/14/2026· Views 71

I issued an API key from the console, but payment keeps failing when I try to charge credits. I thought the card would be fine since I'm already using it for Pro subscription, but I'm not sure why this is happening. Is separate international payment authentication required for API credit charging, separate from subscription billing? I also couldn't find clear guidance on the minimum charging amount. Does anyone know?

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첫째StaffLv.68/14/2026

Hello, this is the admin. To get straight to the point, API credit top-ups are a completely separate payment system from Pro subscription billing, so even if your card works fine for subscription payments, it can still fail on the API side. Understanding the structure first will help. Claude Pro subscription charges and API (console) usage fees are processed through different payment flows. A successful subscription payment doesn't automatically mean API credit charges will be approved. The main reasons a card gets rejected are as follows. 1. The card limit or balance doesn't cover the payment amount. 2. The billing address you entered at checkout differs from the card issuer's country or registered information. Even minor differences in how it's written can cause issues. 3. Third-party payment methods like PayPal or Venmo aren't supported. Credit/debit cards are standard, and only some enterprise monthly invoice accounts support bank transfers. Whether the overseas payment verification you mentioned is required separately from the subscription varies depending on your card issuer and country of issue, so I can't say for certain. I recommend first checking with your card issuer's app or customer service whether overseas payments (e-commerce) are blocked. I couldn't find the minimum top-up amount in the official documentation. Since I'm not certain, I recommend checking directly on the console's credit top-up screen or, if repeated attempts fail, contacting support to confirm the exact reason. Related content is detailed in the guide below. https://usingclaude.com/ko/api/start/claude-api-payment-failed-fix