diff --git a/Flow.Launcher.Core/Plugin/JsonRPCV2Models/JsonRPCPublicAPI.cs b/Flow.Launcher.Core/Plugin/JsonRPCV2Models/JsonRPCPublicAPI.cs
index e0a0434a203..8df2ce9ed9e 100644
--- a/Flow.Launcher.Core/Plugin/JsonRPCV2Models/JsonRPCPublicAPI.cs
+++ b/Flow.Launcher.Core/Plugin/JsonRPCV2Models/JsonRPCPublicAPI.cs
@@ -175,5 +175,15 @@ public void BackToQueryResults()
         {
             _api.BackToQueryResults();
         }
+
+        public void StartLoadingBar()
+        {
+            _api.StartLoadingBar();
+        }
+
+        public void StopLoadingBar()
+        {
+            _api.StopLoadingBar();
+        }
     }
 }
diff --git a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
index d02324eb27d..4c7af4cd437 100644
--- a/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
+++ b/Flow.Launcher.Plugin/Interfaces/IPublicAPI.cs
@@ -334,5 +334,15 @@ public interface IPublicAPI
         /// <param name="cancelProgress">When user cancel the progress, this action will be called.</param>
         /// <returns></returns>
         public Task ShowProgressBoxAsync(string caption, Func<Action<double>, Task> reportProgressAsync, Action cancelProgress = null);
+
+        /// <summary>
+        /// Start the loading bar in main window
+        /// </summary>
+        public void StartLoadingBar();
+
+        /// <summary>
+        /// Stop the loading bar in main window
+        /// </summary>
+        public void StopLoadingBar();
     }
 }