We released Customer Groups API, a new beta feature of Customers API. This API enables you to create customer groups and retrieve segments of customers to take personalized actions. You can use Customer Groups to manually create, update, and delete groups, and search customers by group membership. Customer Segments are created dynamically based on predefined filters, and you can retrieve information about which segments each customer belongs to via the API. Check out our API documentation to get started. As always, feel free to ask questions or provide feedback on Slack or here in the forums!