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Apps often need keys: a Supabase URL, a Stripe publishable key, an API endpoint. Keep them in your project’s environment variables instead of in the code.

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Add a variable

1

Open Env

Click Env in the project’s top bar.
2

Pick the scope

Development is used by the preview, Production by production builds.
3

Save it

Enter the name and value, and save.
Values are encrypted when they’re stored. After saving, the list shows only names and a fingerprint, never the value. Only workspace admins can reveal a value, and every reveal is logged.

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Public and secret

The name decides who can see a value:
Only use EXPO_PUBLIC_ names for keys that are meant to be public, like a publishable key. Appnetic warns you if a public value looks like a secret.

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When the agent needs a key

The agent sees variable names, never their values. If it needs a key you haven’t added, it asks in the chat: paste the value into the card and save, or dismiss it. The request also shows in the Env drawer.