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There are two ways to authenticate with the E2B CLI:

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Option 1: browser authentication

This option requires an interactive browser environment.
Run the following command to sign in through your browser:
This will open your default browser and prompt you to authenticate with your E2B account.

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Option 2: setup environment variables

This is the recommended option for non-interactive environments like CI/CD pipelines, servers, and containers. Set a single environment variable with your API key:
With the API key set, you can run CLI commands directly without e2b auth login. Use CLI version 2.12.1 or later.
Learn more about obtaining and managing your API key on the API Key page.