Now available: JS Buy SDK v3.0

We released the last and final version of JavaScript Buy SDK v3.0 to extend its useful life following the Checkout API deprecation. Upgrading to v3.0 will extend the grace period of SDK's .checkout interface by replacing it with an equivalent interface based on the Cart API with some limitations inherent to the different scope of both APIs. See this upgrade guide with supported use cases to help the transition.

The other option to remain operational is to switch to the Storefront API Client, which manages the API’s authentication information and provides various methods that enable devs to interact with the API. See this migration guide for more details.

Critical Deadline: July 1, 2025 11:00 AM ET. You must implement one of these changes by this date, or customers will not be able to complete purchases. Please choose the option that best suits your needs and timelines.