Producing energy efficient applications without compromising performance is a difficult job for developers as it affects the utility of smart devices. In this paper, we conducted a small-scale evaluation of selected implementations using different methods for making HTTP POST requests. In the evaluation, we measured how much energy is consumed by each implementation and how varying message payload size effects the energy consumption of each implementation. Our results provide useful guidance for mobile app developers. In particular, we found that implementation using OkHttp consumes less energy than the implementation using HttpURLConnection or Volley libraries. These results serve to inform the developers about the energy consumption of different HTTP POST request methods.