diff --git a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
index 2623bab..6a7517c 100644
--- a/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
+++ b/src/main/scala/de/upb/cs/swt/delphi/instancemanagement/InstanceRegistry.scala
@@ -120,7 +120,7 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
   def register(configuration: Configuration): Try[Long] = {
     val instance = createInstance(None, configuration.bindPort, configuration.instanceName)
 
-    Await.result(postInstance(instance, configuration.instanceRegistryUri + "/register") map { response =>
+    Await.result(postInstance(instance, configuration.instanceRegistryUri + "/instances/register") map { response =>
       if (response.status == StatusCodes.OK) {
         Await.result(Unmarshal(response.entity).to[String] map { assignedID =>
           val id = assignedID.toLong
@@ -149,7 +149,7 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
     } else {
       val request = HttpRequest(method = HttpMethods.GET,
         configuration.instanceRegistryUri +
-          s"/matchingInstance?Id=${configuration.assignedID.getOrElse(-1)}&ComponentType=ElasticSearch")
+          s"/instances/${configuration.assignedID.getOrElse(-1)}/matchingInstance?ComponentType=ElasticSearch")
 
       Await.result(Http(system).singleRequest(request.withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt()}"))) map { response =>
         response.status match {
@@ -189,12 +189,17 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
         Failure(new RuntimeException("Cannot post matching result to Instance Registry, assigned ElasticSearch instance has no ID."))
       } else {
         val idToPost = configuration.elasticsearchInstance.id.getOrElse(-1L)
+
+        val matchingData = JsObject("MatchingSuccessful" -> JsBoolean(isElasticSearchReachable),
+          "SenderId" -> JsNumber(configuration.assignedID.getOrElse(-1L)))
+
         val request = HttpRequest(
           method = HttpMethods.POST,
-          configuration.instanceRegistryUri +
-            s"/matchingResult?CallerId=${configuration.assignedID.getOrElse(-1)}&MatchedInstanceId=$idToPost&MatchingSuccessful=$isElasticSearchReachable")
+          configuration.instanceRegistryUri + s"/instances/$idToPost/matchingResult")
 
-        Await.result(Http(system).singleRequest(request.withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt()}"))) map { response =>
+        Await.result(Http(system).singleRequest(request
+          .withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt()}"))
+          .withEntity(ContentTypes.`application/json`, ByteString(matchingData.toJson.toString))) map { response =>
           if (response.status == StatusCodes.OK) {
             log.info(s"Successfully posted matching result to Instance Registry.")
             Success()
@@ -219,7 +224,8 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
     } else {
       val id: Long = configuration.assignedID.getOrElse(-1L)
 
-      val request = HttpRequest(method = HttpMethods.POST, configuration.instanceRegistryUri + s"/deregister?Id=$id")
+      val request = HttpRequest(method = HttpMethods.POST, configuration.instanceRegistryUri +
+        s"/instances/$id/deregister")
 
       Await.result(Http(system).singleRequest(request.withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt()}"))) map { response =>
         if (response.status == StatusCodes.OK) {
@@ -241,9 +247,11 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
 
   def postInstance(instance: Instance, uri: String)(): Future[HttpResponse] = {
     try {
-      val request = HttpRequest(method = HttpMethods.POST, uri = uri, entity = instance.toJson(instanceFormat).toString())
+      val request = HttpRequest(method = HttpMethods.POST, uri = uri)
       //Use generic name for startup, no id present at this point
-      Http(system).singleRequest(request.withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt(useGenericName =  true)}")))
+      Http(system).singleRequest(request
+        .withHeaders(RawHeader("Authorization",s"Bearer ${AuthProvider.generateJwt(useGenericName =  true)}"))
+        .withEntity(ContentTypes.`application/json`, ByteString(instance.toJson(instanceFormat).toString)))
     } catch {
       case dx: DeserializationException =>
         log.warning(s"Failed to deregister to Instance Registry, exception: $dx")
@@ -256,58 +264,6 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
     Instance(id, InetAddress.getLocalHost.getHostAddress,
       controlPort, name, ComponentType.WebApi, None, InstanceState.Running, List.empty[String], List.empty[InstanceLink], List.empty[InstanceLink])
 
-  def reportStart(id: String, configuration: Configuration): Try[ResponseEntity] = {
-    val request = HttpRequest(method = HttpMethods.GET, configuration.instanceRegistryUri + "/reportStart")
-    Await.result(Http(system).singleRequest(request) map { response =>
-      if (response.status == StatusCodes.OK) {
-        Success(response.entity)
-      }
-      else {
-        val statuscode = response.status
-        log.warning(s"Failed to perform reportStart, server returned $statuscode")
-        Failure(new RuntimeException(s"Failed to perform reportStart, server returned $statuscode"))
-      }
-    } recover { case ex =>
-      log.warning(s"Failed to perform reportStart, exception: $ex")
-      Failure(new RuntimeException(s"Failed to perform reportStart, server returned, exception: $ex"))
-    }, Duration.Inf)
-  }
-
-  def reportFailure(id: String, configuration: Configuration): Try[ResponseEntity] = {
-
-    val request = HttpRequest(method = HttpMethods.GET, configuration.instanceRegistryUri + "/reportFailure")
-    Await.result(Http(system).singleRequest(request) map { response =>
-      if (response.status == StatusCodes.OK) {
-        Success(response.entity)
-      }
-      else {
-        val statuscode = response.status
-        log.warning(s"Failed to perform reportFailure, server returned $statuscode")
-        Failure(new RuntimeException(s"Failed to perform reportFailure, server returned $statuscode"))
-      }
-    } recover { case ex =>
-      log.warning(s"Failed to perform reportFailure, server returned, exception: $ex")
-      Failure(new RuntimeException(s"Failed to perform reportFailure, server returned, exception: $ex"))
-    }, Duration.Inf)
-  }
-
-  def reportStop(id: String, configuration: Configuration): Try[ResponseEntity] = {
-
-    val request = HttpRequest(method = HttpMethods.GET, configuration.instanceRegistryUri + "/reportStop")
-    Await.result(Http(system).singleRequest(request) map { response =>
-      if (response.status == StatusCodes.OK) {
-        Success(response.entity)
-      }
-      else {
-        val statuscode = response.status
-        log.warning(s"Failed to perform reportStop, server returned $statuscode")
-        Failure(new RuntimeException(s"Failed to perform reportStop, server returned $statuscode"))
-      }
-    } recover { case ex =>
-      log.warning(s"Failed to perform reportStop, server returned, exception: $ex")
-      Failure(new RuntimeException(s"Failed to perform reportStop, server returned, exception: $ex"))
-    }, Duration.Inf)
-  }
 
   object ReportOperationType extends Enumeration {
     val Start: Value = Value("Start")
@@ -317,11 +273,11 @@ object InstanceRegistry extends InstanceJsonSupport with AppLogging {
     def toOperationUriString(operation: ReportOperationType.Value, id: Long): String = {
       operation match {
         case Start =>
-          s"/reportStart?Id=$id"
+          s"/instances/$id/reportStart"
         case Stop =>
-          s"/reportStop?Id=$id"
+          s"/instances/$id/reportStop"
         case _ =>
-          s"/reportFailure?Id=$id"
+          s"/instances/$id/reportFailure"
       }
     }
   }