n8n Google Contacts and Notion Two-Way Sync

This n8n workflow facilitates a two-way synchronization between Google Contacts and a Notion database. It ensures that changes made in one platform are reflected in the other, keeping your contact information consistent across both services.

What it does

This workflow automates the following steps:

1. Monitors Notion for changes: The workflow is triggered by changes in a specified Notion database.
2. Monitors Google Contacts for changes: The workflow can also be triggered by changes in Google Contacts (though not explicitly shown in the provided JSON, the presence of the Google Contacts node implies this capability).
3. Processes Notion changes:
   • When a new or updated item is detected in Notion, it extracts the relevant contact information.
   • It then checks if a corresponding contact exists in Google Contacts.
   • If the contact exists, it updates the Google Contact with the latest information from Notion.
   • If the contact does not exist, it creates a new Google Contact.
4. Processes Google Contacts changes:
   • When a new or updated contact is detected in Google Contacts, it extracts the relevant information.
   • It then checks if a corresponding item exists in the Notion database.
   • If the item exists, it updates the Notion item with the latest information from Google Contacts.
   • If the item does not exist, it creates a new item in the Notion database.
5. Handles conflicts and ensures data integrity: The workflow uses conditional logic (If nodes) and data manipulation (Set, Filter, Split Out, Merge nodes) to manage data flow and prevent duplicate entries or overwrites.
6. Schedules regular checks: The workflow can be configured to run on a schedule to regularly check for updates in both systems, ensuring continuous synchronization.

Prerequisites/Requirements

To use this workflow, you will need:

• n8n instance: A running instance of n8n.
• Google Account: With access to Google Contacts. You will need to set up Google OAuth2 credentials in n8n.
• Notion Account: With a database configured to store your contacts. You will need to set up Notion API credentials in n8n.
• Notion Database ID: The ID of the Notion database you wish to sync.

Setup/Usage

1. Import the workflow: Download the provided JSON and import it into your n8n instance.
2. Configure Credentials:
   • Set up your Google OAuth2 credentials for the Google Contacts node.
   • Set up your Notion API credentials for the Notion and Notion Trigger nodes.
3. Configure Notion Trigger:
   • Specify the Database ID in the Notion Trigger node that you want to monitor for contact changes.
4. Configure Google Contacts Node:
   • Ensure the Google Contacts node is configured to fetch and update contacts as required by the workflow's logic.
5. Review and Customize:
   • Examine the Set nodes to ensure the mapping of fields between Google Contacts and Notion matches your database structure. You might need to adjust property names.
   • Check the If and Filter nodes to understand the conditional logic and modify it if your specific use case requires different filtering rules.
6. Activate the workflow: Once configured, activate the workflow. You can choose to run it manually via the "Manual Trigger" or set up a "Schedule Trigger" for automatic synchronization at regular intervals.