---
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'
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  affectedApi: []
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: New
    handle: new
  indicatesActionRequired: false
  createdAt: '2023-07-24T16:44:08-04:00'
  postedAt: '2023-07-26T00:00:00-04:00'
  updatedAt: '2024-02-02T10:05:15-05:00'
  effectiveAt: '2023-07-26T00:00:00-04:00'
---

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).