Shopify has expanded cart metafield functionality, making them readable within Shopify Functions GraphQL queries and writable through Checkout UI extensions. Previously limited in scope, cart metafields now work seamlessly across abandoned carts, order edits, draft orders, and other resources. This enhancement means metafield data persists through the customer journey, carrying over to abandoned carts for recovery campaigns and other post-purchase workflows.
This update significantly expands what developers can build on Shopify's platform. By accessing cart metafields in Functions, you can now create more intelligent, data-driven checkout experiences—such as conditional discounts, personalized recommendations, or dynamic pricing based on custom cart attributes. The ability to read and write metafields across multiple checkout contexts (abandoned carts, order edits, draft orders) opens new possibilities for retention strategies and post-purchase experiences without relying on workarounds or external systems.
Building advanced checkout extensions requires proper OAuth authentication and scoped access tokens. GetShopifyToken simplifies obtaining the necessary permissions and credentials needed to read and write cart metafields securely across your Shopify applications.