API key rotation
API key rotation is the practice of periodically replacing an active API key with a new one and revoking the old one, even when there is no known leak. It limits how much damage a key could do if it were compromised without your knowledge.
Why it matters
Rotation only helps if updating every place the key is used is easy. If a key is scattered across several .env files and shell profiles, rotating it becomes a chore people put off.
How often should I rotate an API key?
There is no universal answer, but every 90 to 180 days is a common default for keys with real access.
Does rotating a key break anything using the old one?
Yes, briefly, anything still using the old key will fail until it picks up the new one, so rotate during low-usage windows when possible.
Related
Looking for a different way to manage your keys? See the best Claude Code API key manager alternatives, or browse every term in the glossary.