Anthropic Claude API: How to Add Credits and a Card (2026 Developer Guide)
A guide for developers anywhere to add a card and top up the Anthropic Console, then call Claude Opus / Sonnet / Haiku pay-as-you-go — even without a US bank account.
1. The API is not the same as a subscription
A claude.ai subscription covers the web app and Claude Code usage. The API (console.anthropic.com) is a developer interface billed per token. To build apps, run batch jobs, or power an agent you must use the API, which has its own credit balance and card on file.
2. What you need
Two things: access to console.anthropic.com, and a card that Anthropic will accept. In many countries a local card is declined at checkout, which is exactly the gap a US-issued virtual card fills.
3. Add a card and top up credits
Open Console then Settings then Billing, add your cocodot card, then use Add credits to load your balance (starting with $5 to confirm the card works is a good idea). Credits are usable the moment they post, and you can call the API right away.
4. Pick the right model to save money
Use Sonnet or Haiku for everyday tasks and Opus for the hard problems. Turning on prompt caching cuts a large share of repeated-context cost. Set a spend limit to avoid runaway usage — and your card balance acts as a natural cap on top of that.
5. Common issues
If a card is declined, confirm it has not expired and that the billing address is complete. If credits do not appear, check the invoice status on the Billing page. Need a receipt for accounting? You can download invoices directly from the Console.