HttpClient that simplifies json requests and responses by automatically serialize/deserialize native objects to and from json. JsonClient is fully asynchronous.

import org.mellowtech.jsonclient.{JsonClient,JsonResponse}
import scala.concurrent.Await
import scala.concurrent.duration._

case class ServerResponse(key: String, value: String)

object Test {
  import scala.concurrent.ExecutionContext.Implicits.global
  implicit val formats = org.json4s.DefaultFormats
  val jc = JsonClient()
  val resp = jc.get[ServerResponse]("http://pathToServiceApi")
  var res = Await.result(resp, 4 seconds)

  res.body match {
    case Some(sr) => println(sr)
    case None => println(res.statusCode
  }
  jc.close
}