# 2025-04-10: Cart Service - cart validation and configuration improvement

## Overview

A new cart validation endpoint has been added to allow validating a cart without performing any modifications. Additionally, a new configuration setting has been introduced that allows skipping the validation of the existing cart items when a new item is added to the cart. The configuration improves performance for carts that include multiple items.

## Added endpoints

| Endpoint                                                                                                                                                      | Description                                                                                                                                          |
| ------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------- |
| [Validating cart items](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/carts#get-cart-tenant-carts-cartid-validate)       | Validates cart items' prices.                                                                                                                        |
| [Adding a product to cart](https://developer.emporix.io/api-references/api-guides/checkout/cart/api-reference/cart-items#post-cart-tenant-carts-cartid-items) | When `cartItemValidationSkipExistingItemsValidationOnAddToCart` is set to `true`, the add to cart does not validate the existing cart items' prices. |

## New configuration settings

| Key                                                        | Name                                                            | Type    |
| ---------------------------------------------------------- | --------------------------------------------------------------- | ------- |
| `cartItemValidationSkipExistingItemsValidationOnAddToCart` | Skip existing cart items validation on adding new item to cart. | BOOLEAN |

## Known problems

There are no known problems.