Unexpected access denied when retrieving Google Classroom course list

Courses
1

Hey everyone, I’m having a weird issue with my Android app that uses Google Classroom APIs. It was working fine for months but now I’m getting a 403 Forbidden error when trying to get the courses list.

The error message states that the Classroom API might be disabled or hasn’t been used in my project before. Oddly, everything works perfectly in my debug build, and I haven’t modified any permissions.

Here’s a sample of the code I’m using:

fun fetchCourses() {
    try {
        val service = NewClassroomService.Builder(httpTransport, jsonParser, userCredential)
            .setApplicationName("AlternateClassroomApp")
            .build()
        val courseList = service.courses().list().execute()
        // Continue processing courseList
    } catch (error: Exception) {
        Log.e("FetchError", "Error retrieving courses", error)
    }
}

Any insights on what might be causing this issue and how to resolve it? Could it be related to app signing or Google Console configuration?

2

hey dude, i’ve run into that annoying 403 error before too. check ur google cloud console - sometimes the api gets disabled randomly. also, double-check ur production SHA-1 fingerprint is registered correctly. those little things can mess everything up. good luck fixing it!

3

Hey there ExploringStars! :star2:

Oof, that 403 error sounds super frustrating. I’ve been there too, and it’s such a head-scratcher when things suddenly stop working, right?

Have you checked if anything’s changed with your Google Cloud project recently? Sometimes those sneaky automatic updates can mess things up without us realizing. :thinking:

Also, I’m kinda curious - you mentioned it works in debug but not in production. That’s pretty weird! Have you tried comparing the two builds side by side? Maybe there’s a tiny difference in how they’re handling auth that could give us a clue.

Oh, and random thought - but have you been using the app regularly? I’ve heard sometimes Google can get fussy if an API hasn’t been accessed in a while. Might be worth poking around to see if there’s any kind of ‘reactivation’ needed.

Keep us posted on what you find out! I’m really interested to see what the culprit turns out to be. Good luck!

4

I encountered a similar problem in my own projects, and I found that problems like these can often be traced back to OAuth consent screen settings or production certificate issues. In one case, ensuring that the production SHA-1 fingerprint was properly registered in the Google Cloud Console resolved the issue. Also, verifying that the Classroom API remains enabled in your project and checking that the OAuth client configuration is up to date were crucial steps. Sometimes, regenerating the OAuth 2.0 client ID and reviewing console notifications can provide valuable insights into unexpected access errors.