"Where's your key?" Confused the first time an AI tool asked? 6 quick Q&As:

Q1 What's an API key? A credential from a model provider. The tool uses it to call the model for you; usage is billed to your own account. Think of it as your wallet key.

Q2 How is it billed? Most platforms charge by tokens — roughly "by the word", both what you send and what comes back. Prices vary; check the provider.

Q3 Why "bring your own"? Pick any model, see exactly what you spend, and keep your tool when models change.

Q4 How do I keep it safe? Never post it in chats, screenshots or public repos; use separate keys per purpose; check usage regularly.

Q5 Think it leaked? Revoke it, create a new one, and check recent usage.

Q6 Beginner tip? If your provider supports spending limits or alerts, start with a small one.

What tripped you up when setting up a key?

(Some images are AI-generated.)