Microservice architecture is a popular approach for building various systems. It consists of various dedicated small-sized components from a solid application. Components work together and provide the required business-logic, but each one can be implemented with the most suitable technique. Moreover, overloaded parts can be scaled easily. However, a data transfer layer does not guarantee compatibility of services during their development and maintenance. After changing input or output data type of any microservice of the system, there is a limited set of options to keep up the compatibility. The problem is especially urgent for asynchronous communication because existing systems and standards work mostly with synchronous RPC or REST interoperation or cover high-level description of business-logic. One way to guarantee compatibility is a preliminary check of data types before the services start to serve requests. The current paper describes the development and testing of the method applied to the event-driven