diff --git a/.gitignore b/.gitignore
index 48cc008..0917f87 100644
--- a/.gitignore
+++ b/.gitignore
@@ -452,3 +452,4 @@
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
+/.vscode
diff --git a/VQCalendarAttention/CalendarApiTest.cs b/VQCalendarAttention/CalendarApiTest.cs
new file mode 100644
index 0000000..7784f1f
--- /dev/null
+++ b/VQCalendarAttention/CalendarApiTest.cs
@@ -0,0 +1,66 @@
+using System;
+using System.IO;
+using System.Threading;
+using Google;
+using Google.Apis.Auth.OAuth2;
+using Google.Apis.Calendar.v3;
+using Google.Apis.Calendar.v3.Data;
+using Google.Apis.Services;
+
+internal class CalendarApiTest
+{
+    public static async Task GetLatestEventAsync(string calendarId, string credentialsFilePath)
+    {
+        try {
+                
+            // サービスアカウントの認証情報を読み込む
+            GoogleCredential credential;
+            using (var stream = new FileStream(credentialsFilePath, FileMode.Open, FileAccess.Read))
+            {
+                credential = GoogleCredential.FromStream(stream).CreateScoped(CalendarService.Scope.CalendarReadonly);
+            }
+
+            // GoogleカレンダーAPIのサービスを作成
+            var service = new CalendarService(new BaseClientService.Initializer
+            {
+                HttpClientInitializer = credential,
+                ApplicationName = "VQCalendarAttention",
+            });
+
+            // イベントリストのリクエストを作成
+            var request = service.Events.List(calendarId);
+            request.TimeMin = DateTime.UtcNow;
+            request.ShowDeleted = false;
+            request.SingleEvents = true;
+            request.MaxResults = 10;
+            request.OrderBy = EventsResource.ListRequest.OrderByEnum.StartTime;
+
+            // イベントリストのリクエストを実行
+            var events = await request.ExecuteAsync();
+
+            if (events.Items != null && events.Items.Count > 0)
+            {
+                Console.WriteLine("最新の予定:");
+                foreach (var eventItem in events.Items)
+                {
+                    var when = eventItem.Start.DateTime.ToString() ?? eventItem.Start.Date;
+                    Console.WriteLine($"{eventItem.Summary} ({when})");
+                }
+            }
+            else
+            {
+                Console.WriteLine("近日中の予定はありません。");
+            }
+        }
+        catch (GoogleApiException ex)
+        {
+            Console.WriteLine($"Error: {ex.Message}");
+            Console.WriteLine($"HttpStatusCode: {ex.HttpStatusCode}");
+            Console.WriteLine($"ErrorDetails: {ex.Error}");
+        }
+        catch (Exception ex)
+        {
+            Console.WriteLine($"Error: {ex.Message}");
+        }
+    }
+}
\ No newline at end of file
diff --git a/VQCalendarAttention/Program.cs b/VQCalendarAttention/Program.cs
index c19346f..d9f5c87 100644
--- a/VQCalendarAttention/Program.cs
+++ b/VQCalendarAttention/Program.cs
@@ -7,9 +7,13 @@
 {
     public class Program
     {
-        public static void Main(string[] args)
+        public static async Task Main(string[] args)
         {
-            CreateHostBuilder(args).Build().Run();
+            //CreateHostBuilder(args).Build().Run();
+
+            // テストとしてCalendarApiTestを実行する
+            await CalendarApiTest.GetLatestEventAsync("3e39821e10e795b311f93c79490960c3196632a465a794ca32e8a44c50115dde@group.calendar.google.com", "../calendartowebhook-fa30e21f081f.json");
+
         }
 
         public static IHostBuilder CreateHostBuilder(string[] args) =>