Marketing API v27.0 may add Product showcase to new ads and widen device-targeted Sales ad sets unless you opt out; catalog /batch and lookalike location fields break on v27
What changed
Meta released Graph API v27.0 and Marketing API v27.0 on Nov 4. On v27, Meta may turn on Product showcase (product_extensions) for new ads whose creatives have no showcase setting, when it has high confidence a catalog product set matches the ad; opt out with degrees_of_freedom_spec.creative_features_spec.product_extensions.enroll_status set to OPT_OUT. New eligible Sales ad sets that target specific mobile devices or OS have "Reach more people across other mobile devices" on when targeting.targeting_automation.individual_setting.device is omitted; set device to 0 to keep delivery to the devices you picked (unavailable for Mobile App conversion location and Special Ad Categories; existing ad sets unchanged). That device default reaches all API versions about 90 days later (February 2027, date to be confirmed). Lookalike creation rejects country and location_spec in lookalike_spec (same staged rollout). /{catalog-id}/batch stops on v27; use /items_batch. Graph API v21.0 is removed Jan 21, 2027 and v22.0 on May 20, 2027. The post covers the API only and does not say whether Ads Manager gets the same defaults.
What to do
If any tool, agency script or MCP creates Meta ads through the API, ask its owner which Marketing API version it pins and whether it sends product_extensions OPT_OUT and device: 0 when you need strict device targeting. Spot-check new Sales creatives for unexpected catalog products under the ad, and don't read device-targeted ad set results as device-only once expansion is on. Catalog sync tools must migrate off /batch before they upgrade to v27. Plan Graph API v21 callers off that version before Jan 21, 2027.
Source
- Meta for Developers: Introducing Graph API v27.0 and Marketing API v27.0 (Nov 4) ↗
- PPC Land: Meta's API v27 may add catalog products to new ads by default (Nov 4) ↗
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