---
title: "[Cart AJAX API] Discounts support on /cart/update.js - 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-ajax-api-discounts-support-on-cartupdatejs
  md: https://shopify.dev/changelog/cart-ajax-api-discounts-support-on-cartupdatejs.md
---

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

May 21, 2025

Tags:

* API

# \[Cart AJAX API] Discounts support on `/cart/update.js`

We have added support for discounts in the Cart AJAX API's `/cart/update.js` endpoint. You can now [add or remove discounts from your cart](https://shopify.dev/docs/api/ajax/reference/cart#update-discounts-in-the-cart) using the `discount` parameter.

Learn more about cart discount support on [shopify.dev](https://shopify.dev/docs/api/ajax/reference/cart#update-the-cart-discounts).