Added

September 2026 Release Notes

Enhancement

Subscribe eligibility field

Release date: Available now

Environment: Sandbox and Production

We've added a new field (isSubscribeEnabled) to the List items API response allowing you to identify the items that are eligible to be used as associatedItems in Walmart Subscribe creative assets.

API Contract changes

APIChangeDescriptionTechnical specifications
List Items APINew fieldisSubscribeEnabledView

Shared measurement item set discoverability

Release date: Available now

Environment: Sandbox and Production

Item set list, info, and expression endpoints now include shared measurement item sets in results, enabling users to discover and reuse measurement item sets shared with an advertiser account.

Shared measurement item sets can be identified using the isShared field in the List Item sets response.

Additional Resources

Visit the Advertising Help Center to learn more about measurement item sets.


Forecast API change: adGroupId is now optional

Release date: Available now

Environment: Sandbox and Production

Generate forecasts without first creating an ad group, enabling more efficient campaign planning that aligns better with advertiser workflows.

API Contract changes

APIChangeDescriptionTechnical specifications
Reach Estimate v2Required field changeadGroupId is now optionalView
Delivery Estimate v2Required field changeadGroupId is now optionalView