How do I get an API Key while logged in to my Anthropic account through Claude Sonnet 4 ?
2025-08-22Â
To get an API key for Anthropic's Claude while you're logged into this Claude Sonnet 4 interface, you'll need to access the Anthropic Console separately. Here's how:
Steps to Get Your Anthropic API Key:
Go to the Anthropic Console:
You'll need to sign in with the same account you use for Claude
Navigate to API Keys:
Once logged in, look for "API Keys" in the sidebar or main menu
Or go directly to: https://console.anthropic.com/settings/keys
Create a New API Key:
Click "Create Key" or "Generate API Key"
Give it a descriptive name (like "Vocabulary Presentation Tool")
Copy the key immediately - it won't be shown again
Set Up Billing (if not already done):
You'll need to add a payment method in the Console
Go to "Billing" section to add credit card details
API usage is pay-per-use (different from your current Claude subscription)
Important Notes:
Separate Billing: API usage is billed separately from your Claude chat subscription
Current Pricing: Claude Sonnet 4 API costs around $3 per million input tokens
Rate Limits: New accounts have usage limits that increase over time
Security: Never share your API key publicly - treat it like a password
Alternative Approach:
If you prefer not to use paid APIs initially, you could:
Start with free tiers from OpenAI or Google
Use local LLMs like Ollama (free but requires setup)
Build a mock version first to test the interface
Would you like me to help you modify the template to work with different API providers, or would you prefer guidance on setting up a local LLM for testing?