.package(url: "https://github.com/vapor-community/checkpoint.git", from: "0.1.0")

dependencies: ["Vapor", ..., "Checkpoint"]

import Checkpoint
...
let alexa = router.grouped(Checkpoint.self)

//Alexa.self would be your struct you use to decode the request send by Amazon to your service
//You would need to most likely return a json following the specifications Amazon set
alexa.post(Alexa.self, at: "alexa") { req, alexa -> String in
  //do stuff with alexa and return the proper response
  return "Hi Alexa!"
}