diff --git a/src/BuildingBlocks/StackSdks/Auth/Masa.BuildingBlocks.StackSdks.Auth/Service/IUserService.cs b/src/BuildingBlocks/StackSdks/Auth/Masa.BuildingBlocks.StackSdks.Auth/Service/IUserService.cs
index 2c4e6a871..d0983c65f 100644
--- a/src/BuildingBlocks/StackSdks/Auth/Masa.BuildingBlocks.StackSdks.Auth/Service/IUserService.cs
+++ b/src/BuildingBlocks/StackSdks/Auth/Masa.BuildingBlocks.StackSdks.Auth/Service/IUserService.cs
@@ -71,7 +71,7 @@ public interface IUserService
 
     Task<T?> GetSystemDataAsync<T>(Guid userId, string systemId);
 
-    Task<Dictionary<Guid, T>> GetSystemListDataAsync<T>(IEnumerable<Guid> userIds, string systemId);
+    Task<Dictionary<Guid, T?>> GetSystemListDataAsync<T>(IEnumerable<Guid> userIds, string systemId);
 
     Task<bool> DisableAsync(DisableUserModel user);
 
diff --git a/src/Contrib/StackSdks/Masa.Contrib.StackSdks.Auth/Service/UserService.cs b/src/Contrib/StackSdks/Masa.Contrib.StackSdks.Auth/Service/UserService.cs
index 6fb808543..84365b280 100644
--- a/src/Contrib/StackSdks/Masa.Contrib.StackSdks.Auth/Service/UserService.cs
+++ b/src/Contrib/StackSdks/Masa.Contrib.StackSdks.Auth/Service/UserService.cs
@@ -216,11 +216,11 @@ public async Task UpsertSystemDataAsync<T>(string systemId, T data)
         return dataList.FirstOrDefault().Value ?? default;
     }
 
-    public async Task<Dictionary<Guid, T>> GetSystemListDataAsync<T>(IEnumerable<Guid> userIds, string systemId)
+    public async Task<Dictionary<Guid, T?>> GetSystemListDataAsync<T>(IEnumerable<Guid> userIds, string systemId)
     {
         var requestUri = $"api/user/systemData/byIds";
-        var data = await _caller.PostAsync<Dictionary<Guid, T>>(requestUri, new GetSystemDataModel { UserIds = userIds.ToList(), SystemId = systemId }) ?? new();
-        return data;
+        var data = await _caller.PostAsync<Dictionary<Guid, string>>(requestUri, new GetSystemDataModel { UserIds = userIds.ToList(), SystemId = systemId }) ?? new();
+        return data.ToDictionary(d => d.Key, d => typeof(T) == typeof(string) ? (T)(object)d.Value : JsonSerializer.Deserialize<T?>(d.Value));
     }
 
     public async Task<bool> DisableAsync(DisableUserModel user)
diff --git a/src/Contrib/StackSdks/Tests/Masa.Contrib.StackSdks.Auth.Tests/UserServiceTest.cs b/src/Contrib/StackSdks/Tests/Masa.Contrib.StackSdks.Auth.Tests/UserServiceTest.cs
index d5c8fda5f..26654657e 100644
--- a/src/Contrib/StackSdks/Tests/Masa.Contrib.StackSdks.Auth.Tests/UserServiceTest.cs
+++ b/src/Contrib/StackSdks/Tests/Masa.Contrib.StackSdks.Auth.Tests/UserServiceTest.cs
@@ -485,8 +485,8 @@ public async Task TestIntGetUserSystemDataAsync(string systemId)
         var data = 1;
         var requestUri = $"api/user/systemData/byIds";
         var caller = new Mock<ICaller>();
-        caller.Setup(provider => provider.PostAsync<Dictionary<Guid, int>>(requestUri, It.IsAny<GetSystemDataModel>(), default))
-            .ReturnsAsync(new Dictionary<Guid, int>() { { userId, data } }).Verifiable();
+        caller.Setup(provider => provider.PostAsync<Dictionary<Guid, string>>(requestUri, It.IsAny<GetSystemDataModel>(), default))
+            .ReturnsAsync(new Dictionary<Guid, string>() { { userId, data.ToString() } }).Verifiable();
         var userContext = new Mock<IUserContext>();
         userContext.Setup(user => user.GetUserId<Guid>()).Returns(userId).Verifiable();
         var userService = GetUserService(caller, userContext);
@@ -506,8 +506,8 @@ public async Task TestObjectGetUserSystemDataAsync(string systemId)
         };
         var requestUri = $"api/user/systemData/byIds";
         var caller = new Mock<ICaller>();
-        caller.Setup(provider => provider.PostAsync<Dictionary<Guid, SystemData>>(requestUri, It.IsAny<GetSystemDataModel>(), default))
-            .ReturnsAsync(new Dictionary<Guid, SystemData>() { { userId, data } }).Verifiable();
+        caller.Setup(provider => provider.PostAsync<Dictionary<Guid, string>>(requestUri, It.IsAny<GetSystemDataModel>(), default))
+            .ReturnsAsync(new Dictionary<Guid, string>() { { userId, JsonSerializer.Serialize(data) } }).Verifiable();
         var userContext = new Mock<IUserContext>();
         userContext.Setup(user => user.GetUserId<Guid>()).Returns(userId).Verifiable();
         var userService = GetUserService(caller, userContext);
@@ -515,26 +515,6 @@ public async Task TestObjectGetUserSystemDataAsync(string systemId)
         Assert.IsTrue(result is not null);
     }
 
-    [TestMethod]
-    [DataRow("masa-auth")]
-    public async Task TestGetUserSystemDataAsync(string systemId)
-    {
-        var userIds = new List<Guid> { Guid.NewGuid() };
-        var data = new SystemData
-        {
-            Name = "name",
-            Value = "value"
-        };
-        var requestUri = $"api/user/systemData/byIds";
-        var caller = new Mock<ICaller>();
-        caller.Setup(provider => provider.GetAsync<object, string>(requestUri, new { userIds = string.Join(',', userIds), systemId }, default))
-            .ReturnsAsync(JsonSerializer.Serialize(data)).Verifiable();
-        var userContext = new Mock<IUserContext>();
-        var userService = GetUserService(caller, userContext);
-        var result = await userService.GetSystemListDataAsync<SystemData>(userIds, systemId);
-        Assert.IsTrue(result is not null);
-    }
-
     [TestMethod]
     [DataRow("masa-auth")]
     public async Task TestIntUpsertSystemDataAsync(string systemId)