Cannot buy API credits

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

[BUG] Cannot buy API credits — payment fails with every card, payment method cannot be changed (Account: ghruetter@gmail.com)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report

What's Wrong?

Since February 11, 2026, I am completely unable to purchase API credits on platform.claude.com/settings/billing. All development work using Claude Code / API is blocked.

Three separate issues:

1. "Buy credits" always fails:

• Clicking "Buy credits" and attempting to purchase $25 in credits results in "Payment failed. Please try again."
• This happens with every card I try (Mastercard prepaid, Visa debit)
• The same cards work fine for the claude.ai Pro Plan subscription

2. Payment method cannot be changed:

• Clicking "Ändern" (Change) next to the Mastercard prepaid card redirects back to the billing page without allowing any change
• The "Update payment method" dialog shows the card but provides no way to switch to a different card
• This has been broken for over a week

3. Accidental annual Pro Plan charge:

• On Feb 11, 2026, a payment of €204.73 was processed as an annual Pro Plan subscription instead of API credits
• This was not intended — I wanted to add funds to my API credit balance
• My API balance is now -$0.16, and Claude Code shows "Credit balance too low"

Impact:

• Claude Code is completely unusable (shows "Credit balance too low" error)
• API calls all fail
• No way to add credits through the platform
• Development work has been halted for over a week

Steps to Reproduce

1. Go to https://platform.claude.com/settings/billing
2. Click "Buy credits"
3. Enter any amount (e.g., $25)
4. Click "Buy 25 USD of credits"
5. Result: "Payment failed. Please try again."

OR:

1. Go to https://platform.claude.com/settings/billing
2. Click the edit icon next to "Link by Stripe"
3. In "Update payment method" dialog, click "Ändern" next to the card
4. Result: Page reloads to billing page — no card change possible

Expected Behavior

• Should be able to purchase API credits with a valid card
• Should be able to change the payment method
• The €204.73 should have been applied to API credits, not an annual subscription

Environment

• Platform: platform.claude.com (web browser)
• Browser: Chrome (latest)
• OS: Windows
• Location: Ireland (EU)
• Payment methods tried: Mastercard prepaid (••••1548), Visa (••••7733)
• Account email: ghruetter@gmail.com

Support Contact History

• Emailed support@anthropic.com on February 11, 2026 — no response received after 3+ days
• Attempted live chat — no resolution

Screenshots

[Attach your screenshots showing: negative balance, payment failed error, update payment method dialog, and Claude Code error]

What Should Happen?

Anthropis should resolve the payment issue and accept prepaid Mastercards on its platform ASAP.

Error Messages/Logs

Steps to Reproduce

See Attachments

<img width="2560" height="1440" alt="Image" src="https://github.com/user-attachments/assets/4e16a033-9797-499f-b2bd-dbf301cfdf3e" />
<img width="2560" height="1440" alt="Image" src="https://github.com/user-attachments/assets/def26ce2-fce3-4f50-8fda-eff8397634fc" />
<img width="2048" height="1152" alt="Image" src="https://github.com/user-attachments/assets/0b0a54cb-d4e5-4ff2-86d3-cfc8457c6e50" />

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.42

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_