Skip to main content
E2B_ACCESS_TOKEN was deprecated for security reasons and, as of August 1, 2026, no longer works. It was announced on June 22, 2026. Authenticate with E2B_API_KEY instead.
  • July 1, 2026: new access tokens could no longer be generated in the dashboard. Existing tokens kept working until August 1.
  • August 1, 2026: all access tokens stopped working. Any request authenticated with an access token now fails.
For most people this is a small change. The E2B CLI already authenticates with E2B_API_KEY alone, so it no longer needs the access token. As of August 1, 2026 the infrastructure no longer accepts the token at all. In practice the migration is removing a now-redundant environment variable, and upgrading the CLI if you are on an older version.

​
Who is affected

This affects anyone who authenticates the E2B CLI by setting the E2B_ACCESS_TOKEN environment variable. CI/CD pipelines are the most common case, but the same applies to servers, containers, and local scripts. The E2B SDKs authenticate with API keys, so SDK users are unaffected. The interactive login commands e2b auth login and e2b auth configure set up your local workstation. They are outside the scope of this change. It also affects anyone still on the V1 build system, since V1 builds authenticated with the access token. Now that tokens no longer work, V1 builds have stopped as well. See the V1 build system deprecation to migrate to V2, which builds with E2B_API_KEY.

​
Migrate your CLI authentication

First, get an API key. You can find it in the dashboard keys tab. It is the same key you use with the SDKs. Next, set a single environment variable wherever you run the CLI and remove the access token. Use CLI version 2.12.1 or later (latest recommended).
Terminal
Your API key is scoped to a project, so the CLI targets the right project automatically. There is no separate project variable to set. With the API key set, run CLI commands directly. You do not need to run e2b auth login.
Terminal
If you currently set both variables, delete the E2B_ACCESS_TOKEN line. It is no longer needed.
Terminal