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This section walks through setting up the Gmail connector using a OAuth-enabled Google App. Anyone can do this (even without a paid Google Workspace)! If you’re an organization with a Google Workspace, and you’d rather use a Service Account to access Gmail, it will be available soon!

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Authorization

1

Create Google Cloud Project

2

Enable Gmail API

  • On the left panel, open APIs & services
  • Go to Enabled APIs and services
  • On the top click +ENABLE APIS AND SERVICES
  • Search for Gmail API and click ENABLE
  • Alternatively visit this link, select your project and enable the Gmail API
3

Set up OAuth consent screen

  • Under APIs & services, select the OAuth consent screen tab
  • If you don’t have a Google Organization select External for User Type
  • Call the app Onyx (or whatever you want)
  • For the required emails, use any email of your choice or founders@onyx.app if you wish for the Onyx team to help handle issues.
  • Click SAVE AND CONTINUE
4

Set up scopes

  • Add the scope .../auth/gmail.readonly for Gmail API
To enable permission syncing for this connector:
  • Enable the Admin SDK API (visit this link: https://console.cloud.google.com/flows/enableapi?apiid=admin.googleapis.com) and enable it for your project.
  • Add the scope .../auth/admin.directory.user.readonly for Admin SDK API.
  • Add the scope .../auth/admin.directory.group.readonly for Admin SDK API.
  • The account performing the OAuth flow must have an Admin role in the Google Workspace that has access to the “Groups > Read” privilege. This can be set in the Google Admin Console under Account > Admin roles.
  • Note: Service Account support for Gmail is in development and will be available soon.
Google Cloud OAuth consent screen with Gmail readonly scope selected
5

Set up test users

  • This is only applicable for users without a Google Organization.
  • Add at least one test user email. Only the email accounts added here will be allowed to run the OAuth flow to index new emails.
  • Click SAVE AND CONTINUE, review the changes and click BACK TO DASHBOARD
6

Create OAuth credentials

  • Go to the Credentials tab and select + CREATE CREDENTIALS -> OAuth client ID
Creating OAuth client ID in Google Cloud Console for Gmail
  • Choose Web application and give it some name like OnyxConnector
  • Add an Authorized JavaScript origins
  • http://localhost:3000 if self-hosting
  • https://<INTERNAL_DEPLOYMENT_URL> if you have setup Onyx for production use
  • https://cloud.onyx.app if you are using the Onyx Cloud service
  • Add an Authorized redirect URIs
  • http://localhost:3000/admin/connectors/gmail/auth/callback if self-hosting
  • https://<INTERNAL_DEPLOYMENT_URL>/admin/connectors/gmail/auth/callback if you have setup Onyx for production use
  • https://cloud.onyx.app/admin/connectors/gmail/auth/callback if you are using the Onyx Cloud service
Authorized origins and redirect URIs for Gmail OAuth client
  • Click create and on the right hand side next to Client secret, there is an option to download the credentials as a JSON. Download the JSON for use in the next step.
Download OAuth client JSON credentials from Google Cloud Console
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