Kong promotes architecting applications as microservices, where each service handles specific functionalities and communicates through APIs using protocols like REST, gRPC, or GraphQL. Tools such as Kubernetes and Kuma service mesh facilitate orchestration and network management. The article highlights Insomnia, an open-source API client, for testing GraphQL APIs, demonstrating how to build a GraphQL server in Node.js and use Insomnia to fetch and manipulate data. It explains the process of designing a GraphQL schema, creating queries and mutations, and connecting them to resolvers. Insomnia's features, including schema introspection, auto-complete, plugins for dynamic values, and the ability to inspect headers, enhance the testing experience. The post emphasizes Insomnia's open-source nature and its applicability to various API protocols, along with resources for further learning and community engagement.