RAML is simple and easy to use for describing the RESTful web APIs. It comes with advanced language constructs and good online design tool support, which eases the job of describing the APIs. You can build RAML even during the design phase of the application describing the APIs. Later, during the development phase, you can use the RAML definitions of APIs to generate high-level resource class dentitions.

During development, RAML allows you to develop and test the API client independent of the actual RESTful web service implementation.

Although RAML has many good features, its market adoption is less than that of the other competing products. This is mainly because it came late in the game. However, this tool looks promising in the long run because the community is quite active and there is a wide range of tools available today to support RAML.

In the next section, we will discuss Swagger. Swagger is not just yet another REST API documentation tool; rather, it offers many features in addition to the API documentation.