diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/test/scala/izumi/idealingua/runtime/rpc/http4s/fixtures/TestServices.scala b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/test/scala/izumi/idealingua/runtime/rpc/http4s/fixtures/TestServices.scala
index f4beff85..cfaced6d 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/test/scala/izumi/idealingua/runtime/rpc/http4s/fixtures/TestServices.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-http4s/src/test/scala/izumi/idealingua/runtime/rpc/http4s/fixtures/TestServices.scala
@@ -24,10 +24,11 @@ class TestServices[F[+_, +_]: IO2](
       rejectedNames: Set[String]
     ): IRTServerMiddleware[F, C] = new IRTServerMiddleware[F, C] {
       override def priority: Int = 0
-      override def prepare(methodId: IRTMethodId)(context: C, parsedBody: Json): F[Throwable, Unit] = {
-        F.when(rejectedNames.contains(context.user)) {
-          F.fail(new IRTUnathorizedRequestContextException(s"Rejected for users: $rejectedNames."))
-        }
+      override def apply(methodId: IRTMethodId)(context: C, parsedBody: Json)(next: => F[Throwable, Json]): F[Throwable, Json] = {
+        F.ifThenElse(rejectedNames.contains(context.user))(
+          F.fail(new IRTUnathorizedRequestContextException(s"Rejected for users: $rejectedNames.")),
+          next,
+        )
       }
     }
     final val wsStorage: WsSessionsStorage[F, AuthContext] = new WsSessionsStorageImpl[F, AuthContext](logger)
diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMethod.scala b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMethod.scala
index cc846b89..6169b25e 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMethod.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMethod.scala
@@ -8,6 +8,7 @@ trait IRTServerMethod[F[+_, +_], C] {
   def methodId: IRTMethodId
   def invoke(context: C, parsedBody: Json): F[Throwable, Json]
 
+  /** Contramap eval on context C2 -> C. If context is missing IRTUnathorizedRequestContextException will raise. */
   final def contramap[C2](updateContext: (C2, Json) => F[Throwable, Option[C]])(implicit E: Error2[F]): IRTServerMethod[F, C2] = new IRTServerMethod[F, C2] {
     override def methodId: IRTMethodId = self.methodId
     override def invoke(context: C2, parsedBody: Json): F[Throwable, Json] = {
@@ -16,6 +17,14 @@ trait IRTServerMethod[F[+_, +_], C] {
         .flatMap(self.invoke(_, parsedBody))
     }
   }
+
+  /** Wrap invocation with function '(Context, Body)(Method.Invoke) => Result' . */
+  final def wrap(middleware: (C, Json) => F[Throwable, Json] => F[Throwable, Json]): IRTServerMethod[F, C] = new IRTServerMethod[F, C] {
+    override def methodId: IRTMethodId = self.methodId
+    override def invoke(context: C, parsedBody: Json): F[Throwable, Json] = {
+      middleware(context, parsedBody)(self.invoke(context, parsedBody))
+    }
+  }
 }
 
 object IRTServerMethod {
diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMiddleware.scala b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMiddleware.scala
index f4a7aa10..b22bd29e 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMiddleware.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMiddleware.scala
@@ -4,5 +4,10 @@ import io.circe.Json
 
 trait IRTServerMiddleware[F[_, _], C] {
   def priority: Int
-  def prepare(methodId: IRTMethodId)(context: C, parsedBody: Json): F[Throwable, Unit]
+  def apply(
+    methodId: IRTMethodId
+  )(context: C,
+    parsedBody: Json,
+  )(next: => F[Throwable, Json]
+  ): F[Throwable, Json]
 }
diff --git a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMultiplexor.scala b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMultiplexor.scala
index 343b9181..7774c702 100644
--- a/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMultiplexor.scala
+++ b/idealingua-v1/idealingua-v1-runtime-rpc-scala/src/main/scala/izumi/idealingua/runtime/rpc/IRTServerMultiplexor.scala
@@ -12,6 +12,7 @@ trait IRTServerMultiplexor[F[+_, +_], C] {
       .flatMap(_.invoke(context, parsedBody))
   }
 
+  /** Contramap eval on context C2 -> C. If context is missing IRTUnathorizedRequestContextException will raise. */
   final def contramap[C2](
     updateContext: (C2, Json) => F[Throwable, Option[C]]
   )(implicit io2: IO2[F]
@@ -19,13 +20,13 @@ trait IRTServerMultiplexor[F[+_, +_], C] {
     val mappedMethods = self.methods.map { case (k, v) => k -> v.contramap(updateContext) }
     new IRTServerMultiplexor.FromMethods(mappedMethods)
   }
-
-  final def wrap(middleware: IRTServerMiddleware[F, C])(implicit io2: IO2[F]): IRTServerMultiplexor[F, C] = {
+  /** Wrap invocation with function '(Context, Body)(Method.Invoke) => Result' . */
+  final def wrap(middleware: IRTServerMiddleware[F, C]): IRTServerMultiplexor[F, C] = {
     val wrappedMethods = self.methods.map {
       case (methodId, method) =>
-        val wrappedMethod: IRTServerMethod[F, C] = method.contramap[C] {
+        val wrappedMethod: IRTServerMethod[F, C] = method.wrap {
           case (ctx, body) =>
-            middleware.prepare(methodId)(ctx, body).as(Some(ctx))
+            next => middleware(method.methodId)(ctx, body)(next)
         }
         methodId -> wrappedMethod
     }