Live SDK
The Live software development kit (SDK) contains a set of interfaces that you can use to connect your application to hundreds of millions of users and their devices. Live Connect is a collection of REST, JavaScript, and managed-code APIs that make integrating quick, easy, and flexible.
Live Connect enables you to connect what users do on your site with all of their friends and contacts. You can use the Live Connect APIs to add features such as authentication and instant messaging to your application, creating intuitive experiences that tightly integrate your application with Live Connect.
For important details about the use of the Live SDK, see the Live SDK License Agreement. Then visit the Live Connect Developer Center to learn more about other services and developer offerings.