The Centrify CSharp SDK by Centrify can access the API to integrate identity verification into user's management applications. A signing certificate and an endpoint are required to add SAML XML-based language into an application.
Microsoft’s ASP.NET Web API simplifies the process of building platform-agnostic RESTful HTTP services. The service’s portability makes it a useful tool, and in this tutorial on DeveloperHandbook.com, Jon Preece shows followers how to build a RESTful API using Web API and JWT.
Canadian based startup LoginRadius is a Software As A Service (SAAS) provider of social infrastructure (Social Login and Social Sharing) that is currently used by over 25,000 websites. Despite being a fairly new service (The company was founded in May 2011), LoginRadius has expanded rapidly, partly in thanks to the LoginRadius API.