--- title: Storefront API Cart now exposes selling plan errors - 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/storefront-api-cart-exposes-selling-plan-errors md: https://shopify.dev/changelog/storefront-api-cart-exposes-selling-plan-errors.md --- [Back to Developer changelog](https://shopify.dev/changelog) March 31, 2025 Tags: * Storefront GraphQL API * 2025-07 # Storefront API Cart now exposes selling plan errors As of version 2025-07 of the GraphQL Storefront API, enhanced error handling for selling plans is introduced. The Cart mutations now expose specific user errors for scenarios involving selling plans: * `VARIANT_REQUIRES_SELLING_PLAN`: The error is returned when a merchandise added to the cart requires a selling plan, but none is provided. * `SELLING_PLAN_NOT_APPLICABLE`: The error is returned when a selling plan is added to a merchandise in the cart but is not applicable.