diff --git a/CMakeLists.txt b/CMakeLists.txt
index 319624f..8886500 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,6 +36,8 @@ add_executable(littlesnitch
     editandresend.h
     addonhandler.h
     include/api.h
+    include/httpsender.h
+    include/httpreceiver.h
     mainwindow.ui
     editandresend.ui
 )
diff --git a/editandresend.ui b/editandresend.ui
index 207a77a..14498e8 100644
--- a/editandresend.ui
+++ b/editandresend.ui
@@ -78,12 +78,12 @@
     <rect>
      <x>10</x>
      <y>120</y>
-     <width>781</width>
-     <height>404</height>
+     <width>881</width>
+     <height>441</height>
     </rect>
    </property>
    <property name="sizePolicy">
-    <sizepolicy hsizetype="Maximum" vsizetype="Expanding">
+    <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
      <horstretch>1</horstretch>
      <verstretch>1</verstretch>
     </sizepolicy>
@@ -110,14 +110,20 @@
     <property name="sizeConstraint">
      <enum>QLayout::SetMaximumSize</enum>
     </property>
-    <item row="0" column="0">
+    <item row="0" column="0" colspan="2">
      <widget class="QSplitter" name="splitter_3">
       <property name="sizePolicy">
-       <sizepolicy hsizetype="Maximum" vsizetype="Maximum">
+       <sizepolicy hsizetype="Expanding" vsizetype="Preferred">
         <horstretch>1</horstretch>
         <verstretch>1</verstretch>
        </sizepolicy>
       </property>
+      <property name="minimumSize">
+       <size>
+        <width>200</width>
+        <height>200</height>
+       </size>
+      </property>
       <property name="sizeIncrement">
        <size>
         <width>1</width>
diff --git a/include/httpreceiver.h b/include/httpreceiver.h
new file mode 100644
index 0000000..4775304
--- /dev/null
+++ b/include/httpreceiver.h
@@ -0,0 +1,18 @@
+#pragma once
+
+#include <include/api.h>
+#include <QObject>
+
+namespace http {
+
+#define HTTPReceiverInterfaceIID "bigsnitch.api.HTTPReceiverInterface/100"
+
+class ReceiverInterface {
+
+public:
+    virtual ~ReceiverInterface() = default;
+};
+
+}
+
+Q_DECLARE_INTERFACE(http::ReceiverInterface, HTTPReceiverInterfaceIID)
diff --git a/include/httpsender.h b/include/httpsender.h
new file mode 100644
index 0000000..a4906b1
--- /dev/null
+++ b/include/httpsender.h
@@ -0,0 +1,21 @@
+#pragma once
+
+#include <include/api.h>
+#include <QObject>
+
+namespace http {
+
+#define HTTPSenderInterfaceIID "bigsnitch.api.HTTPSenderInterface/100"
+
+class SenderInterface {
+
+public:
+    virtual ~SenderInterface() = default;
+    virtual int send(http::Request request);
+    virtual bool received(int id);
+    virtual std::optional<http::Response> receive(int id);
+};
+
+}
+
+Q_DECLARE_INTERFACE(http::SenderInterface, HTTPSenderInterfaceIID)