Google said it plans to shutdown the GData Admin Settings API. It is giving developers one year to migrate to newer tools. The API will cease functioning in August 2017.
The Admin Settings API lets Google Apps admins retrieve and change the settings of their domains in the form of Google Data API feeds, according to Google. For example, admins could use the API to create a custom control panel or integrate Google Apps domains into an existing legacy environment. The Admin Settings API has been mostly replaced and/or duplicated by the Google Apps Admin SDK, so Google is depracating APIs it believes have reached the end of their life-cycle or are no longer in significant use.
Some, but not all of the Admin Settings API's functions have replacements. The API has six main functions: general settings, account settings, appearance settings, verification settings, single sign-on settings, and gateway and routing settings. The last four of these tools have no direct replacement, and the first two have only limited replacements. For example, under the general settings tool, the /defaultLanguage and /organizationName endpoints have been replicated in the Customer API, while the remaining two endpoints have not and will be discontinued.
Once August 16, 2017, arrrives, all calls to the API and any features in your app that depend on the API will no longer work. Google suggests developers migrate to the Google Apps Admin SDK as soon as possible.
The Admin SDK lets developers build customized administrative tools for busineses that rely on Google Apps. Google first launched the Admin SDK in May 2013 and has been depracating older APIs ever since. In April 2015, for example, Google dropped the Provisioning and Email Migration APIs. These functions are available within the Admin SDK.
Given that the Admin SDK has been available for more than three years, the number of apps impacted by the GData Admin Settings API shutdown should be minimal.