With the advent of the Internet of Everything (IoE), people, things, data and process, which used to function as independent territories, are now being brought together, trying to break down the ‘siloed’ system architecture in the past. Among various important research fields of IoE, smart home is gaining more and more public attention. There are many IoE-oriented framework schemes generally designed for large-scale projects, but most of them lack for a specific emphasis on smart home functionalities. Aside from that, there are still few well-functioning open-source smart home prototypes provided for developers to rapidly develop a smart home system, with less dependency on a specific brand or service vendor. Motivated by this, an open-source rapid prototype framework for a smart home system is designed for providing a RESTful API that can integrate mobile applications, home sensor network and data processing. It is expected to provide developers and users with convenience and scalability to rapidly build up a smart home platform. Furthermore, an implementation will be presented to show how the open RESTful API can be practically applied to an integrated smart home platform to provide users specific services using a mobile device.