From their site: You can use the API to integrate TokBox into your site and auto-register/auto-authenticate your users. This way, you can seamlessly offer your users an option to chat with each other live or send each other video messages. There are two ways to integrate TokBox on websites: embedding the widget and using the API. While embedding the widget is a simple way of using a TokBox account on any webpage (like a personal webpage or your favorite social network profile page), the API is designed for developers of other websites, so their users can register and use TokBox on that website.
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The OpenTok Server PHP SDK provides guides to generate sessions and create tokens for accessing WebRTC features. See the additional links at:
The OpenTok Server .NET SDK allows creating a session that will attempt to transmit streams directly between clients, creating a session that uses the OpenTok Media Router, and creating an automatically archived session.
The OpenTok .NET SDK allows to generate sessions and tokens for apps that run on the .NET platform. It includes support for OpenTok archives. Available API reference, download, samples, and sample code.
The OpenTok Android SDK provides an interface for Android applications to the OpenTok API, enabling the integration of a cloud platform that aims to integrate live chat, video and voice messaging for applications using WebRTC.