Updates and Feature Enhancements:
We’ve introduced significant improvements to Custom Fields, providing you with more control and flexibility when creating and managing custom data
We’ve added new guides to help you get started quickly with creating contacts and email campaigns
New Open Source SDKs are now available on GitHub to streamline your development process
Technology Partners: please update your applications to use the new Partner Authorization Request URL
The full release notes can be found in our V3 API documentation here:
V3 API Release Notes - September 2025