diff --git a/GameData/CacheProxy/CachedExpenseRepository.cs b/GameData/CacheProxy/CachedExpenseRepository.cs
new file mode 100644
index 0000000..aef983f
--- /dev/null
+++ b/GameData/CacheProxy/CachedExpenseRepository.cs
@@ -0,0 +1,43 @@
+using GameData.Repository;
+using GameModel;
+using GameModel.Contract;
+using Microsoft.Extensions.Caching.Memory;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Caching;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace GameData.CacheProxy
+{
+    /// <summary>
+    /// cache for repository data, implemented as proxy not as decorator https://www.youtube.com/watch?v=nmAE-JzNSEw
+    /// </summary>
+    public class CachedExpenseRepository : IExpenseRepository
+    {
+        IMemoryCache _cache;
+        ExpenseRepository _repository;
+
+        public CachedExpenseRepository(ExpenseRepository repository, IMemoryCache cache) 
+        { 
+            _repository = repository;
+            _cache = cache;
+        }
+
+        public Task Delete(IEnumerable<PlayerExpense> enumerable)
+        {
+            return _repository.Delete(enumerable);
+        }
+
+        public Task<IEnumerable<Expense>> GetAll()
+        {
+            return _cache.GetOrCreateAsync("allexpenses", factory => _repository.GetAll());
+        }
+
+        public Task<PlayerExpense> Save(PlayerExpense data)
+        {
+            return _repository.Save(data);
+        }
+    }
+}
diff --git a/GameData/GameData.csproj b/GameData/GameData.csproj
index ac88806..66616c2 100644
--- a/GameData/GameData.csproj
+++ b/GameData/GameData.csproj
@@ -8,8 +8,10 @@
 
   <ItemGroup>
     <PackageReference Include="Autofac" Version="7.1.0" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="8.0.0" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.3" />
+    <PackageReference Include="System.Runtime.Caching" Version="8.0.0" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/GameData/Repository/ExpenseRepository.cs b/GameData/Repository/ExpenseRepository.cs
index 287d043..4218893 100644
--- a/GameData/Repository/ExpenseRepository.cs
+++ b/GameData/Repository/ExpenseRepository.cs
@@ -18,9 +18,7 @@ namespace GameData.Repository
         
         string UrlExpense => "items/expense";
         string UrlPlayerExpense => "items/playerexpense";
-        List<PlayerExpense> _memberExpenses = new List<PlayerExpense>();
-
-        private List<Expense> _expenses = null;
+        List<PlayerExpense> _memberExpenses = new List<PlayerExpense>();        
 
         public ExpenseRepository(ILogger<ExpenseRepository> log, ApiClient apiClient)
         {
@@ -32,18 +30,9 @@ namespace GameData.Repository
 
         public async Task<IEnumerable<Expense>> GetAll()
         {
-            if (_expenses == null)
-            {
-                _log?.LogDebug("loading expenses from api");
-                var res = await _apiClient.Get<Expense>(UrlExpense);
-                _expenses = new List<Expense> { };
-                _expenses.AddRange(res);
-            }
-            else
-            {
-                _log?.LogDebug("returning expenses from cache");
-            }
-            return _expenses;
+            _log?.LogDebug("loading expenses from api");
+            var res = await _apiClient.Get<Expense>(UrlExpense);
+            return res;
         }
 
         public async Task<PlayerExpense> Save(PlayerExpense memberExpense)
diff --git a/KoogleCli/KoogleCli.csproj b/KoogleCli/KoogleCli.csproj
index 79f2981..01a8966 100644
--- a/KoogleCli/KoogleCli.csproj
+++ b/KoogleCli/KoogleCli.csproj
@@ -21,6 +21,7 @@
     <PackageReference Include="AsyncAwaitBestPractices" Version="7.0.0" />
     <PackageReference Include="AutofacSerilogIntegration" Version="5.0.0" />
     <PackageReference Include="CommandLineParser" Version="2.9.1" />
+    <PackageReference Include="Microsoft.Extensions.Caching.Memory" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="8.0.0" />
     <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="8.0.0" />
diff --git a/KoogleCli/Program.cs b/KoogleCli/Program.cs
index 0d696fc..f273471 100644
--- a/KoogleCli/Program.cs
+++ b/KoogleCli/Program.cs
@@ -4,6 +4,7 @@ using Autofac.Core;
 using AutofacSerilogIntegration;
 using CommandLine;
 using GameData;
+using GameData.CacheProxy;
 using GameData.Dummy;
 using GameData.Repository;
 using GameHandler;
@@ -15,9 +16,11 @@ using GameModel.Contracts;
 using GameModel.DeathGame;
 using GameModel.Settings;
 using KoogleCli.Model;
+using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.Options;
 using Serilog;
 using Spectre.Console;
 using Spectre.Console.Json;
@@ -53,9 +56,13 @@ Autofac.IContainer Register()
     RegisterAppsettings(builder);
 
     RegisterLogging(builder);
-
+    var test = new MemoryCache(new MemoryCacheOptions());
     builder.RegisterType<ApiClient>();
-    builder.RegisterType<ExpenseRepository>().As<IExpenseRepository>().InstancePerLifetimeScope();
+    builder.RegisterType<CachedExpenseRepository>().As<IExpenseRepository>().InstancePerLifetimeScope();
+    builder.RegisterType<ExpenseRepository>().InstancePerLifetimeScope();
+    builder.RegisterInstance(new MemoryCacheOptions()).As<IOptions<MemoryCacheOptions>>();
+    builder.RegisterType<MemoryCache>().As<IMemoryCache>().InstancePerLifetimeScope();
+
     builder.RegisterType<GameRepository>().As<IGameRepository>().InstancePerLifetimeScope();
     return builder.Build();
 }
@@ -136,9 +143,18 @@ void StartGameAction(string gameName, Guid gameId)
 
     if (gameId.Equals(Guid.Empty))
     {
-        var starttask = _gs.Start(new[] { 1, 2, 3, 4 }, GetGameSettings(gameName), gameName);
-        gameState = starttask.Result;
-    } else
+        try
+        {
+            var starttask = _gs.Start(new[] { 1, 2, 3, 4 }, GetGameSettings(gameName), gameName);
+            gameState = starttask.Result;
+
+        }
+        catch (Exception e)
+        {
+            Console.WriteLine(e.Message);            
+        }    
+    }
+    else
     {
         var starttask = _gs.Load(gameId);
         gameState = starttask.Result;