---
title: Cart Transform Function API - 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/cart-transform-function-api
  md: https://shopify.dev/changelog/cart-transform-function-api.md
---

[Back to Developer changelog](https://shopify.dev/changelog)

July 26, 2023

Tags:

* API

# Cart Transform Function API

You can now use the Cart Transform Function API to expand or merge cart line items. The Cart Transform API is used to [build customized bundles](https://shopify.dev/docs/apphttps://shopify.dev/docs/apps/selling-strategies/bundles/add-a-customized-bundles/selling-strategies/bundles/add-a-customized-bundle).

For more information on the Cart Transform Function API [click here](https://shopify.dev/docs/api/functions/reference/cart-transform).

For an overview on building a custom bundle offering [click here](https://shopify.dev/docs/apps/selling-strategies).