The Mailgun C# SDK by Mailgun communicates to the API to integrate email features into applications. Useful to validate and analyze user interactivity. Includes RestSharp, a REST and HTTP client for .NET. It also offers Mono, a cross-platform framework sponsored by Xamarin.
Google has just announced that over 40 new metrics and dimensions have been added to the Google Analytics API. The new data points can be queried using the Core Reporting API and allow developers to create reports similar to those found in the Google Analytics Web interface.
The Vibetrace API integrates Vibetrace's recommendation engine, accessing virtually any e-commerce platform. The name of the game, of course, is to move people from your target market to become visitors, then shoppers, regular customers and finally, part of your engaged community. Vibetrace's secret sauce for increasing conversion rates is a csutom built recommendation engine. It joins nearly 200 e-commerce APIs in our directory.