Purpose. Development of a prototype of an information system for monitoring the demand for a service in the city infrastructure system. Methodology. The object-oriented approach was used to formalize the monitoring technology. Unified modeling language was used to design a prototype of information technology monitoring. Results. The architecture of information technology of demand monitoring was offered. It has a block structure and contains three categories of classes, which contain procedures for obtaining input information, computational procedures, and control procedures. A use case diagram was constructed to describe the functionality and behavior of the information technology architecture element. Visualization of relationships between the calculation components of the monitoring data analysis unit to identify regularities in the formation of demand profiles was presented using a class diagram. It contains five classes, interconnected by a certain type of aggregation. Originality. The architecture of the demand monitoring information system based on the analysis and classification of demand profiles for the service was proposed. Practical value. The integration of the developed prototype into the information system for monitoring the functioning of urban systems will identify changes in the actual operation conditions of their facilities. This will increase the efficiency of decisionmaking on the management of the operation modes of facilities. Conclusions. Implementation of information technology of demand analysis and identification of its cyclical changes due to the influence of external factors will help improve the information support of the process of managing the operation modes of facilities and planning effective modes of their work taking into account the actual operation conditions. The block structure of the proposed information monitoring technology provides for the possibility of adding new calculation and control procedures, which provides the opportunity to expand the monitoring functions and their integration into the information system for monitoring the functioning of the urban infrastructure system. References 15, figures 3.