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+``AkkaHttpBackend``
+===================
+
+To use, add the following dependency to your project::
+
+  "com.softwaremill.sttp" %% "akka-http-backend" % "0.0.20"
+
+This backend depends on `akka-http <http://doc.akka.io/docs/akka-http/current/scala/http/>`_.
+A fully **asynchronous** backend. Sending a request returns a response wrapped
+in a ``Future``.
+
+Next you'll need to add an implicit value::
+
+  implicit val sttpBackend = AkkaHttpBackend()
+  
+  // or, if you'd like to use an existing actor system:
+  implicit val sttpBackend = AkkaHttpBackend.usingActorSystem(actorSystem)
+
+This backend supports sending and receiving 
+`akka-streams <http://doc.akka.io/docs/akka/current/scala/stream/index.html>`_
+streams of type ``akka.stream.scaladsl.Source[ByteString, Any]``.
+
+To set the request body as a stream::
+
+  import com.softwaremill.sttp._
+  import com.softwaremill.sttp.akkahttp._
+  
+  import akka.stream.scaladsl.Source
+  import akka.util.ByteString
+  
+  val source: Source[ByteString, Any] =   ...
+  
+  sttp
+    .streamBody(source)
+    .post(uri"...")
+
+To receive the response body as a stream::
+
+  import com.softwaremill.sttp._
+  import com.softwaremill.sttp.akkahttp._
+  
+  import akka.stream.scaladsl.Source
+  import akka.util.ByteString
+  
+  implicit val sttpBackend = AkkaHttpBackend()
+  
+  val response: Future[Response[Source[ByteString, Any]]] = 
+    sttp
+      .post(uri"...")
+      .response(asStream[Source[ByteString, Any]])
+      .send()
+