Amazon opens DSP inventory management APIs - what changed in March: Amazon Ads launched unified inventory management APIs in open beta in March 2026, consolidating deals, proposals, and inventory groups under the API v1 model. https://ppc.land/amazon-opens-dsp-inventory-management-apis-what-changed-in-march/ #AmazonAds #DSPInventory #APIs #InventoryManagement #DigitalMarketing