Google: OAuth2 single service

This document contains instructions for creating a Google credential for a single service. They're also available as a video.

Prerequisites

There are five steps to connecting your n8n credential to Google services:

First, create a Google Cloud Console project. If you already have a project, jump to the next section:

With your project created, enable the APIs you'll need access to:

If you haven't used OAuth in your Google Cloud project before, you'll need to configure the OAuth consent screen (opens in a new tab):

Access your Google Cloud Console - Library (opens in a new tab). Make sure you're in the correct project.

Check the project dropdown in the Google Cloud top navigation
Open the left navigation menu and go to APIs & Services > OAuth consent screen. Google will redirect you to the Google Auth Platform overview page.
Select Get started on the Overview tab to begin configuring OAuth consent.
Enter an App name and User support email to include on the Oauth screen. Select Next to continue.
For the Audience, select Internal for user access within your organization's Google workspace or External for any user with a Google account. Refer to Google's User type documentation (opens in a new tab) for more information on user types. Select Next to continue.
Select the Email addresses Google should use to contact you about changes to your project. Select Next to continue.
Read and accept the Google's User Data Policy. Select Continue and then select Create.
In the left-hand menu, select Branding.
In the Authorized domains section, select Add domain:
- If you're using n8n's Cloud service, add n8n.cloud
- If you're self-hosting, add the domain of your n8n instance.
Select Save at the bottom of the page.

Next, create the OAuth client credentials in Google:

Access your Google Cloud Console (opens in a new tab). Make sure you're in the correct project.
In the APIs & Services section, select Credentials (opens in a new tab).
Select + Create credentials > OAuth client ID.
In the Application type dropdown, select Web application.
Google automatically generates a Name. Update the Name to something you'll recognize in your console.
If you're self-hosting: From your n8n credential, copy the OAuth Redirect URL. Paste it into the Authorized redirect URIs in Google Console. If you're using n8n cloud, you can leave this field empty as the OAuth setup is pre-configured, and the callback URL is fixed for that configuration.
Select Create.

With the Google project and credentials fully configured, finish the n8n credential:

From Google's OAuth client created modal, copy the Client ID. Enter this in your n8n credential.
From the same Google modal, copy the Client Secret. Enter this in your n8n credential.