Notion Developers Release Notes

We released v5.1.0 of @notionhq/client, our SDK for JavaScript and TypeScript. This includes the following fixes and improvements:

• Add support for is_locked boolean parameter on update page and database APIs (to update whether a page is locked in the Notion app UI)
• dataSource.update: add support for changing a data source’s parent database
• Remove page_id as a possible parent for CreateDataSourceBodyParameters
• Add request_id to Client log lines

As noted in the library’s README, v5 and above of the SDK isn’t compatible with API versions older than 2025-09-03. See the upgrade guide to learn more.

Important API update coming September 3rd

We're introducing multi-source databases to Notion! Our new API version 2025-09-03 separates “databases” (containers) from “data sources” (tables), unlocking powerful new organizational capabilities.

What you need to know:

• Current integrations continue working with single-source databases
• Update to the new API version to support multi-source databases
• We're introducing the concept of API versioning to integration webhooks as well

Start upgrading your integrations now to ensure a smooth transition when users begin creating additional data sources starting from September 3rd. Full details and migration guide: Upgrading to 2025-09-03 General information about API versioning: Versioning

We are excited to announce an update to our Notion Public API token format. Starting September 25, 2024, newly generated Public API tokens will automatically use the ntn_ prefix instead of the secret_ prefix.

Why the Change?

This change is part of our ongoing efforts to improve the security of our API. By introducing the ntn_ prefix, we aim to:

• Enhance compatibility with secret scanners and other security tools, making it easier to identify and manage Notion API tokens.
• Provide a clearer distinction between Notion API tokens and other types of secrets, reducing the risk of misconfiguration and improving overall security.

What Do You Need to Do?

• New Integrations: For any new integrations, the tokens will be automatically generated with the ntn_ prefix. Simply generate your tokens as usual through the Notion API settings page.
• Existing Tokens: All existing tokens with the secret_ prefix will continue to work without any changes. There is no immediate need to update your existing integrations.
• Token Format: We strongly advise against using regular expressions (regex) to identify or validate Notion Public API tokens. The token format may change over time, and relying on regex patterns could lead to false positives or negatives. Instead, treat the token as an opaque string and use it as provided.
• Best Practices: To handle Notion API tokens securely:
  • Store tokens securely using appropriate encryption methods.
  • Use Notion's official SDKs or libraries when available, as they handle token management correctly.
  • Validate tokens by making authenticated requests to Notion's API rather than parsing the token itself.

Questions or Concerns?

If you have any questions or need assistance with this transition, please feel free to reach out to our support team or visit our docs.

• The Examples page was updated with all our most recent demo code. We’ve organized these sample integrations by level of experience with the Public API to help developers who are newer to the Public API find introductory code more easily.
• A note was added to all API endpoint documentation directing developers to review the Status codes page for a complete list of error codes that can be returned by API requests.
• A clarification was added to the Request limits page and Append block children endpoint documentation to indicate the current limit for appending a list of block children per API request. Up to 100 block children can be appended at a time.

• The updates related to the Formulas 2.0 launch are now live in the Public API. These changes will not impact most developers using the Public API; however, please note that the formatting of formula.expression, which is returned when retrieving a database with a Formula property, has changed. See Notion's Help Center articles for more information on the Formula 2.0 changes:
  • Formulas 2.0: How to use Notion’s new and improved formulas with your existing setups
  • How to write Notion formulas that extend the capabilities of your databases
• The example for the Formula database property was updated to align with the new Formula 2.0 launch.
• New sample code was added to the Notion SDK for JavaScript’s examples directory. This new example demonstrates how to use the Public API with basic and intermediate levels of difficulty.