diff --git a/qa_interfaces/ITestPlugin.h b/qa_interfaces/ITestPlugin.h
new file mode 100644
index 00000000..d529cca3
--- /dev/null
+++ b/qa_interfaces/ITestPlugin.h
@@ -0,0 +1,58 @@
+/*
+ * If not stated otherwise in this file or this component's LICENSE file the
+ * following copyright and licenses apply:
+ *
+ * Copyright 2024 Metrological
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "Module.h"
+
+namespace Thunder {
+namespace QualityAssurance {
+
+    // @json 1.0.0
+    struct EXTERNAL ITestPlugin : virtual public Core::IUnknown {
+        enum { ID = ID_TESTPLUGIN };
+
+        // @event
+        struct EXTERNAL INotification : virtual public Core::IUnknown {
+            enum { ID = ID_TESTPLUGIN_NOTIFICATION };
+            ~INotification() override = default;
+
+            // @brief Signals that a greeting was generated
+            // @param message The greeting message
+            virtual void OnGreeting(const string& message) = 0;
+        };
+
+        ~ITestPlugin() override = default;
+
+        virtual Core::hresult Register(ITestPlugin::INotification* notification) = 0;
+        virtual Core::hresult Unregister(ITestPlugin::INotification* notification) = 0;
+
+        // @brief Returns the input string unchanged
+        // @param input The input string to echo back
+        // @param output The echoed output string
+        virtual Core::hresult Echo(const string& input, string& output /* @out */) = 0;
+
+        // @brief Returns a greeting message
+        // @param name The name to greet (empty defaults to "World")
+        // @param message The greeting message
+        virtual Core::hresult Greet(const string& name, string& message /* @out */) = 0;
+    };
+
+} // namespace QualityAssurance
+} // namespace Thunder
diff --git a/qa_interfaces/QAIds.h b/qa_interfaces/QAIds.h
index 08173dc0..5f17cd3a 100644
--- a/qa_interfaces/QAIds.h
+++ b/qa_interfaces/QAIds.h
@@ -74,8 +74,10 @@ namespace QualityAssurance {
         ID_TESTKEEP                                  = ID_TESTTEXTOPTIONS + 4,
         ID_TESTKEEP_NOTIFICATION                     = ID_TESTTEXTOPTIONS + 5,
         ID_TESTCUSTOM                                = ID_TESTTEXTOPTIONS + 6,
-        ID_TESTCUSTOM_NOTIFICATION                   = ID_TESTTEXTOPTIONS + 7
+        ID_TESTCUSTOM_NOTIFICATION                   = ID_TESTTEXTOPTIONS + 7,
 
+        ID_TESTPLUGIN                                = RPC::IDS::ID_EXTERNAL_QA_INTERFACE_OFFSET + 0x060,
+        ID_TESTPLUGIN_NOTIFICATION                   = ID_TESTPLUGIN + 1
     };
 }
 }