Trouble Completing OAuth Authorization for Google Calendar actions on iOS ChatGPT App (but works on web/desktop app)

[robinz]

I’ve set up a GPT Action following the OpenAI Cookbook tutorial to integrate Google Calendar with ChatGPT.

Everything works fine and as expected on:

• the web apps (iOS browser and laptop browser)
• desktop apps (macOS)

When I hit “Sign in with Google,” I can authenticate just fine, grant permissions, and then ChatGPT can access my calendar data.

But not on the official iOS ChatGPT application though.

I keep running into an error during the OAuth login step. It never completes the authorization, and I end up stuck without the ability to pull my calendar events.

step 1:

step 2:

step 3:

Here’s what I’ve tried so far:

• Double-checked that my redirect URI matches the one provided by ChatGPT, and that it’s listed as an authorized redirect URI in my Google Cloud Console settings.

• Confirmed that I’m using the same scopes and OAuth configuration that work perfectly on desktop and web.

• Updated the ChatGPT iOS app to the latest version, just to rule out any bugs.

• no VPNs

• added my email to the test users in google OAuth consent (in google console)

My ultimate goal is to be able to seamlessly sign in on iOS just like on desktop and web, so I can create and list calendar events from the ChatGPT iOS app. Has anyone else run into this problem, or does anyone know what might be causing the OAuth flow to fail specifically on iOS? Any guidance or suggestions would be appreciated.

Sidenotes: it’s an issue when initiating the OAuth connection for “the first time”. If I initiate from the web app or desktop app. It can continue to work on mobile (whether in the same chat or a new one) but only for some time. After that I need to re-initialise the OAuth and it’s not working if I do it from iOS (but again, it will only work on web/desktop app).

Hypothesis:
Since the iOS chatgpt app is opening the google authentication inside an embedded safari browser. Looks like the issue is how this embedded safari works with the chatGPT app. I tried to open in another browser (chrome or else) but I still face the issue and doesn’t ultimately redirect me to the chatGPT app.

similar issues here:

OAuth 2 auth flow fails in mobile (1.2024.157) but works on the web interface

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GPTS - Actions and Oauth (with google)

I built a GPT with an Action on google calendar APIs, basically to read the events. I set up the oauth correctly but when i try it with the live GPT i get to the auth panel ( as user) and then redirected to the chat but there I get “Couldn’t log in with plugin.” error. How can i solve this

[matt.stenger]

Fought with Oauth all week.

There are two primary challenges:

First, any significant change to your configuration or actions will trigger a new redirect URL. Minor updates won’t. And it’s hard to tell exactly what triggers a major update.

But the bigger issue is that you are always given a chat.openai.com redirect url and ar often having a chatgpt.com conversation. The 308 redirect works, but may be losing POST data.

I suggest expanding your allowed referrers and testing the chatgpt.com return instead of the chat.openai.com return.

Also, your VM will have a “new chat avaialble” a lot during any transition. Use them. Get used to typing your “welcome back, let’s fix this” message a lot.