An analysis of the speed and efficiency of data transfer using the WebSocket and REST API protocols was carried out. To compare the speed of processing stream objects and identify a more reliable technology for developing APIs, expansions of basic functions in Taylor and Fourier series were used. As a result, it was revealed that the REST API is a faster and more accessible resource for transmitting information data in a bitwise transformation, and the scalability of this protocol prevails in the number of processed units, which allows expanding the number of tests performed.