Hi Vijay,
In our previous email, the link to the full API migration details didn’t work — apologies for the inconvenience. We’ve corrected it below so you can access everything you need.

Databases just got more powerful! Now supporting multiple data sources and linked views in a single database, creating a unified hub for your workflows.
This comes with an important API update for customers using internal integrations. Our new API version 2025-09-03 separates "databases" from "data sources,” unlocking powerful new organizational capabilities.
You are receiving this email because we detected that your workspace, Va, has had at least one API call in the last 30 days that may be impacted by this functionality.
What you need to do:
• Update your integrations to the new API version 2025-09-03 to support multiple data sources
◦ We're introducing the concept of API versioning to integration webhooks as well
• [Recommended] Restrict permissions on mission-critical databases to prevent users from adding new data sources before API migration is complete.
Start upgrading your integrations now to ensure a smooth transition when your team is ready to add new data sources to your workflows.
What happens if you do not act:
• Current integrations will continue to work with single source databases
• If a user in your workspace adds a new data source to a database with a connected internal integration — actions your integration takes using the API such as creating pages under the database, or updating the database, will stop working.
◦ If you start seeing errors for a second data source, you can revert that change by moving the additional data source to a separate database, and the internal integration will resume working
Full API migration details
Thanks,
The Notion Team
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