AvidMobile, mobile marketing solutions provider, gives developers two-way access to its mobile marketing platform through the AvidMobile API. The two-way approach to an API strategy allows AvidMobile users to better engage targets and track success. The API is available to build a custom app upon, or users can simply send and receive SMS messages from existing apps.
Google Contacts API gives client applications access to a user’s contacts list where the application can create new contacts, update or delete existing ones, or query for contacts that match particular criteria. This tutorial explains how to implement the API in C# and ASP.NET with OAuth 2.0.