Today, we are announcing the deprecation of versions v201108 , v201111 , and v201201  of the DFP API. In roughly 3 months, on Dec 10th , these versions will be turned off. Turning off older versions allows us to make sure that everyone can benefit from the improvements in more recent releases and to focus on releasing new features.release notes page  also contains changelogs for each version, which will help you migrate to a newer version.  If you aren’t using one of our client libraries , now would be a great time to start as well.  If you have any feedback or comments about this deprecation, or the API in general, please feel free to leave them on our forum .Adam Rogal , DFP API Team