Shop User Metafields Now Accessible in Shopify Functions

Shopify now allows developers to read Shop User metafields during checkout through Shopify Functions. This update extends the data available to Functions that run at checkout, adding access to cross-merchant buyer identity information.

What Changed

Shop User represents Shopify’s unified buyer identity across different merchants. Developers who store custom data on Shop Users through metafields can now access this information when building Shopify Functions. Previously, this cross-merchant data was not available during the checkout process through Functions.

The update applies to any Shopify Function that runs during checkout, including payment customizations, delivery customizations, and cart transforms. Developers can query Shop User metafields using the same patterns they use for other metafield types in Functions.

Impact for Developers

This change enables new personalization and business logic capabilities for apps that work across multiple Shopify stores. Developers can now build Functions that recognize returning Shop Users and apply customized checkout experiences based on their cross-merchant purchase history or preferences.

Apps that already use Shop User metafields to track buyer preferences, loyalty status, or custom attributes can now incorporate this data into checkout customizations. This creates opportunities for more sophisticated discount logic, shipping options, or payment methods based on a buyer’s complete Shop profile rather than their history with a single merchant.

Developers implementing this feature should review the Shop User metafields guide in the Shopify documentation for implementation details and access patterns specific to Functions.

Read the full announcement →