# 2026-04-24: Cart Service - cart.updated event on any cart modification

## Overview

The Cart Service now emits the `cart.updated` event whenever a cart is modified. This standardizes event behavior so downstream consumers can reliably react to all cart changes.

## Updated endpoints

| Endpoint                                                                                                                                                                           | Description                                             |
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------- |
| [Updating a cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#put-cart-tenant-carts-cartid)                                           | Emits `cart.updated` when cart-level data is changed.   |
| [Changing a cart site](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#post-cart-tenant-carts-cartid-changesite)                          | Emits `cart.updated` when the cart site is changed.     |
| [Changing a cart currency](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#post-cart-tenant-carts-cartid-changecurrency)                  | Emits `cart.updated` when the cart currency is changed. |
| [Refreshing a cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#put-cart-tenant-carts-cartid-refresh)                                 | Emits `cart.updated` when the cart is refreshed.        |
| [Merging carts](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#post-cart-tenant-carts-cartid-merge)                                      | Emits `cart.updated` when carts are merged.             |
| [Adding a cart item to cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#post-cart-tenant-carts-cartid-items)                    | Emits `cart.updated` when a new item is added.          |
| [Adding multiple cart items to cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#post-cart-tenant-carts-cartid-itemsbatch)       | Emits `cart.updated` when items are added in batch.     |
| [Updating a cart item](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#put-cart-tenant-carts-cartid-items-itemid)                    | Emits `cart.updated` when an item is updated.           |
| [Deleting a cart item](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#delete-cart-tenant-carts-cartid-items-itemid)                 | Emits `cart.updated` when an item is removed.           |
| [Deleting all items from cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#delete-cart-tenant-carts-cartid-items)                | Emits `cart.updated` when cart items are cleared.       |
| [Applying a discount to cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/discounts#post-cart-tenant-carts-cartid-discounts)                | Emits `cart.updated` when a discount is applied.        |
| [Removing all discounts from cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/discounts#delete-cart-tenant-carts-cartid-discounts)         | Emits `cart.updated` when all discounts are removed.    |
| [Removing a discount from cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/discounts#delete-cart-tenant-carts-cartid-discounts-discountid) | Emits `cart.updated` when a single discount is removed. |

## Known problems

There are no known problems.


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