11/10/2026
🚨 Action Required for Shopify Developers: API 2027-01 Update
Shopify is making `owner_type` mandatory for metafield declarations in Checkout UI and Customer Account UI extensions.
Key points:
• Add `owner_type` to every declaration in `shopify.extension.toml`.
• API 2026-10 supports the field now, giving you time to migrate.
• Deployments on API 2027-01+ will be blocked if it is missing.
• Use separate declarations when the same namespace and key belong to different resource types.
✅ Audit your extension configuration, update the owner values, and redeploy before upgrading.
Need help with a Shopify API update or custom app? Connect with Trident Spark today.
Read the full update: https://www.tridentspark.com/new-owner_type-field-for-metafield-declarations-in-checkout-and-customer-account-ui-extensions-required-in-2027-01/