After successfully removing several older versions of the DFP API earlier this month, we’re continuing our 'Spring Cleaning' by reminding everyone that support for version v201302 or earlier of the DFP API will end on August 1st, 2014. If you are still using one of those versions after that date, all requests will fail and your application will cease to work until you migrate to a supported version. Please reference the release notes for all changes to the API when migrating to a newer version.
In addition, please note that ClientLogin support is being phased out and that you will have to migrate to OAuth 2.0 in order to authenticate starting with v201403. Please reference our OAuth 2.0 implementation guide for help with this process.