From their site: Answerbag is a community of people helping others. We're here to help you connect with others and to find and share knowledge. Any topic you can dream of, you can ask it here. Answerbag provides all of its core question and answer data through a set of Read-Only API Calls, and it also provides Write API calls that allow the writing of content to its database. The Write APIs require that you registered and authenticate your users with Answerbag.