Every new line item needs to declare whether or not they will serve Eurpoean Union (EU) political ads. Display & Video 360 API and SDF uploads that don't provide declarations will fail. See our deprecations page for more details.
[null,null,["Last updated 2025-09-09 UTC."],[],["This document details how to create a new line item via an API. A `POST` request is sent to `https://displayvideo.googleapis.com/v3/advertisers/{lineItem.advertiserId}/lineItems`, using a `lineItem.advertiserId` path parameter which is a unique advertiser ID. The request body must contain a `LineItem` instance. A successful request returns a new `LineItem` instance in the response body. This process needs the `https://www.googleapis.com/auth/display-video` OAuth scope for authorization. Note that YouTube & Partners line items are not supported by this method.\n"],null,[]]