Google Calendar

Google Calendar is a web-based calendar service developed by Google.

Authentication Types

Google Calendar supports 2 authentication methods:

• OAuth - Create your own Google Cloud OAuth app. Every user connects with their Google account.

  • Pros: Full control, per-user tracking, production-ready
  • Cons: Requires Google Cloud Console setup

• Instant OAuth - Use Willow's pre-configured Google app for the fastest setup.

  • Pros: Fastest setup, no configuration needed
  • Cons: Limited scopes, not recommended for production

Setting up OAuth

1. Go to https://console.cloud.google.com/

2. Create a new project or select an existing one

3. Go to APIs & Services → Library, search for "Google Calendar API", and click Enable

4. In the left sidebar, go to APIs & Services → OAuth consent screen

5. Choose External or Internal and fill in the required information

6. On the Scopes page, add the Calendar scopes you need:

   • https://www.googleapis.com/auth/calendar (full access)
   • https://www.googleapis.com/auth/calendar.readonly (read-only)

7. Go to APIs & Services → Credentials

8. Click Create Credentials → OAuth client ID

9. Select Web application

10. Under Authorized redirect URIs, add:

    • For SaaS deployments: https://{org}.mcp-s.com/{org}/api/auth/callback
    • For On-Premise deployments: {connectUrl}/{org}/api/auth/callback

11. Click Create

12. Copy the Client ID and Client Secret

13. In Willow, paste the Client ID and Client Secret

14. Select the same scopes you configured

15. Click Save Changes