Logging into Codex CLI on a Remote Environment Without GUI

When authenticating with Codex CLI by running:

$ codex login

The OAuth 2.0 redirect URI will be in the following format:

http://localhost:1455/auth/callback
  ?code=********nareyfq6HasaFKLa8s9v8q59eAsdPhf9-4haA9.ghq9-4haGiaaAags758uydafsiojkAODOs2579IOUho
  &scope=openid+profile+email+offline_access
  &state=********vMtCtfk87o5LoIRUgcVR54XFvaA4Gbpgc4x

However, when you run codex login on a remote environment and authenticate through your local browser, localhost:1455 is being listened to on the remote environment, not your local machine. Naturally, the redirect fails and you cannot receive the authorization code.

In such cases, you can open another terminal on the remote server and send a request equivalent to the redirect using curl.

$ curl -iL "http://localhost:1455/auth/callback?code=********nareyfq6HasaFKLa8s9v8q59eAsdPhf9-4haA9.ghq9-4haGiaaAags758uydafsiojkAODOs2579IOUho&scope=openid+profile+email+offline_access&state=********vMtCtfk87o5LoIRUgcVR54XFvaA4Gbpgc4x"