How to Safely Protect Your API Keys

Replit users can integrate a variety of third-party services via API to build powerful features, but in this process, safely managing API keys is essential. If an API key is leaked, someone else could impersonate the user or make unauthorized payments, causing financial loss.

To prevent this, Replit provides a Secrets feature. If an API key is registered as a Secret, the key will not be exposed externally even if the code is shared or another user forks that Repl.

Additionally, Replit automatically scans all Repls posted to the community to check whether API keys for major services such as OpenAI, GitHub, npm, PyPI, Discord, and Sendgrid are directly included in the code. If a leaked key is found, the Repl is immediately unpublished, and the key is revoked through the service provider's method.

If you receive a notification about an API key leak, you should take the following actions:

• Log in to the relevant service account and check for unauthorized payments and usage history.
• Issue a new API key.
• Instead of entering the new key directly into the code, be sure to register it through the Secrets feature.