API Key

What it is

An API key is a secret credential that authenticates your requests to an AI service. It's like a password that identifies you and tracks your usage for billing. API keys should be kept secret—anyone with your key can use (and be charged for) the service as you.

Why it matters

API keys are essential for using AI APIs but must be handled carefully. Never commit them to public code repositories, share them in plain text, or expose them in client-side code. Use environment variables and secure storage. Leaked keys can result in unexpected bills or service abuse.