API Key

In one sentenceA secret code that identifies you to a service's API. Treat it like a password: it can access data and run up charges.

What it means

When software connects to an API, it sends the API key to prove who is calling and which account to bill.

How to use it

• Store keys in a password manager or the tool's secure settings, never in a shared doc, email or public website.
• If a key leaks, revoke it in the provider's dashboard and create a new one.
• Set spending limits on AI provider accounts so a leaked or misused key cannot cost you a fortune.

Related terms

API Rate Limit AI Data Privacy