Your Shopify app can start showing a compatibility warning on October 1.
If your app touches merchant-owned shipping configuration and is not marked compatible with Market-driven shipping, newly installing merchants can see a warning. Existing merchants can also opt in before your app is ready and hit broken shipping behavior.
WHAT CAN GO WRONG
A green API response does not mean the merchant's live shipping setup changed.
On shops using Market-driven shipping, merchant-owned delivery-profile reads can represent legacy state. Writes can succeed without updating the merchant's live shipping configuration. Shopify says it will not automatically migrate merchants using an incompatible app, but merchants can opt in manually.
WHAT TO VERIFY BEFORE OCTOBER 1
- Identify every read or write against merchant-owned delivery profiles.
- Separate merchant-owned dependencies from app-owned delivery profiles that can keep using the existing APIs.
- Replace affected read/write paths with the appropriate Markets, Contextual Product Feeds, or app-profile approach.
- Test clean installs and existing installs in the Market-driven shipping feature preview.
- Submit compatibility confirmation only after the affected workflows pass regression testing.
2-MINUTE CHECK
Find out whether your app is actually in the migration path.
ShipReady turns seven architecture and testing questions into a focused readiness result. If you need the implementation handoff, the full pack is $6.99.
OFFICIAL SOURCES
Shopify: Upgrade your app for Market-driven shipping ↗
Shopify: Merchant-owned delivery profile API deprecation ↗
The rollout dates are targets and may shift. Verify Shopify's current documentation before release.