---
title: 'Now available: JS Buy SDK v3.0 - Shopify developer changelog'
description: >-
  Shopify’s developer changelog documents all changes to Shopify’s platform.
  Find the latest news and learn about new platform opportunities.
source_url:
  html: 'https://shopify.dev/changelog/now-available-js-buy-sdk-v30'
  md: 'https://shopify.dev/changelog/now-available-js-buy-sdk-v30.md'
metadata:
  effectiveApiVersion: ''
  affectedApi: []
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: Breaking API Change
    handle: breaking-api-change
  indicatesActionRequired: true
  createdAt: '2025-03-13T12:36:30-04:00'
  postedAt: '2025-03-13T13:00:00-04:00'
  updatedAt: '2025-03-13T12:58:38-04:00'
  effectiveAt: '2025-03-14T12:00:00-04:00'
---

March 13, 2025

Tags:

* Action Required
* API

# 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](https://shopify.dev/changelog/deprecation-of-checkout-apis). 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](https://shopify.dev/docs/api/storefront/2025-01/objects/Cart) with some limitations inherent to the different scope of both APIs. See this [upgrade guide](https://github.com/Shopify/js-buy-sdk/blob/main/README.md#how-to-upgrade-to-v30) with supported use cases to help the transition.

The other option to remain operational is to switch to the [Storefront API Client](https://github.com/Shopify/shopify-app-js/tree/main/packages/api-clients/storefront-api-client#readme), which manages the API’s authentication information and provides various methods that enable devs to interact with the API. See this [migration guide](https://github.com/Shopify/js-buy-sdk/tree/main/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.