OpenTok is a hosted API for adding real-time video chat to your application. The API gives developers the ability to create private one-to-one chats, group chats, or broadcasts that can stream to thousands of viewers in real-time.
When developing with OpenTok, most of the development is done on the client. The server is used only to generate and distribute room ids (sessions) and security credentials (tokens) to the client.
OpenTok has client-side libraries for JavaScript, iOS, and ActionScript, and server-side libraries for Ruby, PHP, Java, Python, .NET and Node.js. This add-on will set up your server-side environment for use with OpenTok.