Is it possible to get Google Calendar API access token directly from Firebase GoogleAuthProvider?

Question

I'm using Firebase Authentication to log in users with Google in my web app. I want to access Google Calendar API on behalf of the user.

Currently, Firebase gives me a Firebase ID token and a temporary Google access token (that expires after an hour) via GoogleAuthProvider.credentialFromResult(result).accessToken, but it does not provide a refresh token.

const handleGoogleLogin = async () => {
    const provider = new GoogleAuthProvider();
    provider.addScope("https://www.googleapis.com/auth/calendar.events");
    provider.setCustomParameters({
        approval_prompt: 'force',
        access_type: 'offline'
    });
    const result = await signInWithPopup(auth, provider);
    const credential = GoogleAuthProvider.credentialFromResult(result);
    console.log(credential);
};

My goal is to be able to create calendar events on behalf of the user without asking them to explicitly approve OAuth consent every time.

Is there a way to use only Firebase Authentication to obtain a long-lived access token or refresh token for Google APIs? I’d like to understand if Firebase can act as a complete bridge to Google APIs, or if OAuth is always required.

Frank van Puffelen · Accepted Answer · 2025-10-20 14:51:48Z

0

Based on the Firebase documentation for signInWithPopup, this example from the documentation on GoogleAuthProvider seems to do what you want:

// Sign in using a redirect.
const provider = new GoogleAuthProvider();
// Start a sign in process for an unauthenticated user.
provider.addScope('profile');
provider.addScope('email');
await signInWithRedirect(auth, provider);
// This will trigger a full page redirect away from your app

// After returning from the redirect when your app initializes you can obtain the result
const result = await getRedirectResult(auth);
if (result) {
  // This is the signed-in user
  const user = result.user;
  // This gives you a Google Access Token.
  const credential = GoogleAuthProvider.credentialFromResult(result);
  const token = credential.accessToken;
}

So you can use credentialFromResult to get the OAuth credentials that were used, and then get the access token from there.

answered Oct 20 at 14:51

Frank van Puffelen

603k85 gold badges895 silver badges869 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

sophiie Oct 21 at 6:54

I get an access token but it expires after an hour, I also need a refresh token, but it seems i can only get it using OAuth

Frank van Puffelen Oct 21 at 15:21

Firebase's own ID token expires after an hour, but I don't think the access token expires that quickly. If it does for you, edit your question to show how you determined that. From the comments here it seems that getting the refresh token from the GoogleAuthProvider in Firebase is not supported, and you'd need to use a GApi call for that.

Collectives™ on Stack Overflow

Is it possible to get Google Calendar API access token directly from Firebase GoogleAuthProvider?

1 Answer 1

2 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related