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Get a Claude (Anthropic) API key

  1. Go to console.anthropic.com
  2. Sign in, then open Settings → API keys
  3. Click Create key and copy it — it starts with sk-ant-
The Anthropic console API keys page

No free tier. Anthropic needs prepaid credit — $5 goes a long way at these volumes.

Once you have the key, add it in Settings — see the BYOK overview for how.