# Google Drive folder picker returns 403: “unregistered callers”

**URL:** <https://community.make.com/t/google-drive-folder-picker-returns-403-unregistered-callers/114396>\
**Category:** Questions\
**Tags:** error\
**Created:** [September 4, 2026, 1:45am UTC](https://community.make.com/t/google-drive-folder-picker-returns-403-unregistered-callers/114396 "2026-09-04T01:45:04Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sub](https://avatars.discourse-cdn.com/v4/letter/s/aeb1de/32.png) [@sub](https://community.make.com/u/sub)\
**Post date:** [September 4, 2026, 1:45am UTC](https://community.make.com/t/google-drive-folder-picker-returns-403-unregistered-callers/114396/1 "2026-09-04T01:45:04Z")

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### 🎯 What is your goal?

I want to create a Make scenario that creates a text file in my Google Drive.

### 🤔 What is the problem & what have you tried?

I am using the Google Drive “Create a File from Text” module with a custom Google OAuth connection. Google authentication succeeds and the connection is created successfully. However, when I click “Click here to choose folder” in the module, the folder picker fails with a 403 error. I have also refreshed the connection and created a new connection with the same result.

### 📋 Error messages or input/output bundles

[403] Method doesn’t allow unregistered callers (callers without established identity). Please use API Key or other form of API consumer identity to call this API.

### 📸 Screenshots (scenario flow, module settings, errors)

 ![Screenshot_20260904-103808.png](https://europe1.discourse-cdn.com/flex013/uploads/make/original/3X/3/b/3bc54f063d62c7e109efd2ffbbda514f493fe3c9.png)

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<div class="post-metadata">

**Author:** ![WorkflowRescue](https://avatars.discourse-cdn.com/v4/letter/w/bbe5ce/32.png) [@WorkflowRescue](https://community.make.com/u/WorkflowRescue)\
**Post date:** [September 4, 2026, 9:43am UTC](https://community.make.com/t/google-drive-folder-picker-returns-403-unregistered-callers/114396/3 "2026-09-04T09:43:35Z")

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That 403 is coming from the folder picker request, so I’d first separate a picker problem from a Drive connection problem:

1. Change the Folder field from “select from list” to Map / enter manually.
2. Paste the folder ID from the Google Drive URL and run the module with a tiny text file.

If the file is created, your OAuth connection and Drive write permission are working; only the picker is failing. You can keep the mapped folder ID as a workaround and report the picker issue to Make Support.

If the run also fails, check the custom OAuth project against Make’s setup guide: Drive API enabled, the required Drive scopes added, the correct Make redirect URI, and your Google account added as a test user (or the app published). Then recreate the connection once after those settings are corrected:

> **[Connect to Google services using a custom OAuth client - Help Center](https://help.make.com/connect-to-google-services-using-a-custom-oauth-client)**
>
> Create a custom OAuth client in Google Cloud Platform to connect Google services to Make

Reauthorizing the same connection won’t help if the project configuration is unchanged, so the manual-folder test is the quickest way to isolate this.