Use Visual Studio 2017 to create an empty Web API project. Make sure you add unit tests to the solution. This empty solution will be used as a stub for the generated code.
Run InstantWebAPI application, select the stub Visual Studio solution file (.sln) created in first step.
Using a database connection dialog create a connection string to your server. Application supports MS SQL server, Express or Azure.
Once a connection is established to the database, select the tables or views for which Web API needs to created and start the code generator.
Code will be generated into the initial stub Visual Studio solution. At this point the solution can be build and is ready to use.
The solution should contain 2 projects; one for the actual Web API and another one for Unit Tests.