August 13, 2026 - Catalogs: Replace API (Beta)

The Catalogs Replace API (Beta) lets you swap the entire contents of a catalog — and optionally its schema — in a single atomic operation. Open a session with /catalogs/replace/start, load items through /catalogs/replace/items, then apply them with /catalogs/replace/complete (or drop them with /catalogs/replace/cancel). The current catalog keeps serving reads until the new revision is applied, so campaigns never see an empty or half-filled catalog. Opt in with the Batch-Beta: catalog-replace header on each call. Learn more.