--- title: Cart and Checkout Validations are now available in Developer Preview - 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-and-checkout-validations-are-now-available-in-developer-preview md: https://shopify.dev/changelog/cart-and-checkout-validations-are-now-available-in-developer-preview.md --- [Back to Developer changelog](https://shopify.dev/changelog) February 9, 2023 Tags: * API # Cart and Checkout Validations are now available in Developer Preview The Shopify Functions API for cart and checkout validations is now available in the Checkout Extensibility developer preview. This API allows you to apply validation rules that run in both the cart and checkout, ensuring that purchases meet certain criteria before checking out, or completing the order. Learn more about building cart and checkout validations in our dev docs: [Cart and Checkout validations](https://shopify.dev/api/functions/reference/cart-checkout-validation)