play-swagger | Swagger spec generator for play framework

In short you need to add sbt-play-swagger plugin which generates swagger.json on package time, then you just need to have a swagger UI instance to consumer that swagger spec. You can find the setup in the example project as well.
type a regex matching the type for which the custom specs is
specAsParameter a list of objects to be used when this type is used by a route path parameter or query string parameter. Being a list of json object allows you to expand a single parameter into multiple ones, but in other cases you just need to provide one json object. If you leave this one an empty array, the parameter with this type will be hidden. You must provide a list here, though.
specAsProperty, a json object to be used when the type is used as a property in a definition. If you leave this one empty, play-swagger will try to use the first element in specAsParameter, please note that although most of the fields are common between the two types of spec, a couple of them aren’t.