The idea of the project is to give user something light, something that could cover a set of basic needs when you develop a web-service (Like rest-framework, basic DI-framework, web-client, connection management, object-mapping etc...) and make it highly customizable at the same time.

So when you need to kickoff something from scratch you don't need to do anything more than a git clone starter-project and start coding. And when it comes time for additional requirements you cant easily substitute ex. any SSL backend, any http-client, add http compression etc... And oat++ provides interfaces to configure there things.

See more: Example how to create web-service with swagger-uI and auto-documented endpoints https://medium.com/oatpp/c-oatpp-web-service-with-swagger-ui...