---
title: Cart validation errors on online store cart and Storefront 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-validation-errors-on-online-store-cart-and-storefront-api
  md: https://shopify.dev/changelog/cart-validation-errors-on-online-store-cart-and-storefront-api.md
---

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

September 13, 2023

Tags:

* API
* 2023-10

# Cart validation errors on online store cart and Storefront API

As of Storefront GraphQL API version **2023-10**, we’ve added the `VALIDATION_CUSTOM` error type to `CartErrorCode` so that you can use validation errors in carts.

Learn more about cart validation errors on [Shopify.dev](https://shopify.dev/docs/api/storefront/2023-10/enums/CartErrorCode).