diff --git a/pkgs/clan-app/clan_app/api/__init__.py b/pkgs/clan-app/clan_app/api/__init__.py
index 0c524ee2f..5fd480501 100644
--- a/pkgs/clan-app/clan_app/api/__init__.py
+++ b/pkgs/clan-app/clan_app/api/__init__.py
@@ -124,6 +124,9 @@ class GObjApi:
                 msg = f"Overwritten method '{m_name}' has different signature than the implementation"
                 raise ClanError(msg)
 
+    def has_obj(self, fn_name: str) -> bool:
+        return fn_name in self._obj_registry or fn_name in self._methods
+
     def get_obj(self, fn_name: str) -> type[ImplFunc]:
         result = self._obj_registry.get(fn_name, None)
         if result is not None:
diff --git a/pkgs/clan-app/clan_app/views/webview.py b/pkgs/clan-app/clan_app/views/webview.py
index 36bda7c8a..4f931cceb 100644
--- a/pkgs/clan-app/clan_app/views/webview.py
+++ b/pkgs/clan-app/clan_app/views/webview.py
@@ -86,8 +86,27 @@ class WebExecutor(GObject.Object):
         log.debug(f"Webview Request: {json_msg}")
         payload = json.loads(json_msg)
         method_name = payload["method"]
+        data = payload.get("data")
 
         # Get the function gobject from the api
+        if not self.api.has_obj(method_name):
+            self.return_data_to_js(
+                method_name,
+                json.dumps(
+                    {
+                        "op_key": data["op_key"],
+                        "status": "error",
+                        "errors": [
+                            {
+                                "message": "Internal API Error",
+                                "description": f"Function '{method_name}' not found",
+                            }
+                        ],
+                    }
+                ),
+            )
+            return
+
         function_obj = self.api.get_obj(method_name)
 
         # Create an instance of the function gobject
@@ -95,7 +114,6 @@ class WebExecutor(GObject.Object):
         fn_instance.await_result(self.on_result)
 
         # Extract the data from the payload
-        data = payload.get("data")
         if data is None:
             log.error(
                 f"JS function call '{method_name}' has no data field. Skipping execution."