---
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
metadata:
  effectiveApiVersion: 2023-10
  affectedApi: []
  primaryTag:
    displayName: API
    handle: api
  secondaryTag:
    displayName: New
    handle: new
  indicatesActionRequired: false
  createdAt: '2023-09-13T14:13:12-04:00'
  postedAt: '2023-09-13T00:00:00-04:00'
  updatedAt: '2024-12-13T17:24:39-05:00'
  effectiveAt: '2023-09-13T00:00:00-04:00'
---

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).