Abstract: – The article considers the study of the connection model of a Web application and a Web service directly and through a
proxy. A cross-platform high-performance environment is considered ASP.Net. The MVC pattern is used during development.
Request generation is implemented using the REST architectural style and the HTTP hypertext transfer protocol. A model of
interaction between a Web application and a Web service is being built. The purpose of this work is to study this model of interaction
directly and through a proxy. A Web application was developed, which is a video rental service and a Web service, the functional
purpose of which is to work with a Web server database. A separate project was created to implement the build proxy. In the project
settings, the data transfer protocol, API host, port and request forwarding routings were registered. A previously developed service
was used as an API. The model was studied using Postman software and browser tools. The results of the study show the pros and
cons of using a proxy when interacting with a Web application and a Web service. This article will help customers, developers of
Web applications to choose a model for connecting a Web application and a Web service that corresponds to the tasks being solved.
Index terms: ASP.NET, Web service, REST architectural style, API, proxy assembly.