The Authy .NET SDK by Authy allows API interaction to access authentication data. Configuration demonstrates how to install mercurial, download the SDK, install Xamarin, and import a new project in Xamarin studio.
Last year, dating app OKCupid removed the ability for its users to view who had visited their profiles, but a developer this week revealed that visitor data had still been available via OKCupid's Visitor API. In a blog post, Zack Whipkey detailed how he was able to access detailed user information.
A few months ago, ProgrammableWeb announced the release of Heroku’s Platform API, which allowed developers to integrate the Heroku platform with third party applications and services. Now, Heroku has launched a public beta for OAuth 2.0 support for the Platform API. OAuth 2.0 support allows developers to control service needs as opposed to offering full service access to all user accounts.