Abstract-Development of remote laboratory for embedded systems complex hardware/software design is an actual task, because the challenges existing in this area, require qualitatively new techniques, technologies and tools of design. By using the possibilities of remote labs and reusable hardware/software components, developer can more optimally organize the project and realize it in a shorter time. Development and usage of remote labs for designers can give new opportunities and ways for accumulation and study of existing design experience and ready solutions. On the other side, today, in the area of remote laboratories development are no common standards and approaches. Different developers offer different solutions for laboratory functionality, interfaces, a set of experiments, etc. At the same time, there are a number of ready-made solutions that can be used repeatedly for more optimal development and rapid integration with existing projects. Therefore, investigation and implementation of re-use methodology and its practical realization is an urgent task. The paper presents the structural components and API of remote laboratory RELDES, proposed for reuse in other projects for creation of mobile applications, new clients or services. Open questions of RESTful API documenting are also discussed.Index Terms-embedded systems design; remote laboratory; software/hardware components reuse; API; RESTrequest.