Wowza Streaming Engine software has REST Application Programming Interfaces (APIs) that can be used to manage, configure, and monitor the media server with HTTP requests. Wowza Streaming Engine 4.1 includes a servlet that provides access to runtime documentation of these REST APIs as a preview feature. The documentation is displayed as JSON data in the Swagger user interface (v1.2). Developers can use the "Try it out!" buttons in the Swagger UI to control the Streaming Engine software if they acquire a preview license.