diff --git a/ChatClient/App.xaml.cs b/ChatClient/App.xaml.cs
index 2def0a7..2696a4f 100644
--- a/ChatClient/App.xaml.cs
+++ b/ChatClient/App.xaml.cs
@@ -1,4 +1,5 @@
 using ChatClient.Models;
+using RestSharp;
 using System;
 using System.Collections.Generic;
 using System.Configuration;
@@ -17,5 +18,7 @@ public partial class App : Application
     {
         public static Frame PageFrame { get; set; }
         public static AccessTokenModel? AccessToken { get; set; }
+
+        public static RestClient client = new RestClient();
     }
 }
diff --git a/ChatClient/LoginPage.xaml.cs b/ChatClient/LoginPage.xaml.cs
index c3757e0..28b36a3 100644
--- a/ChatClient/LoginPage.xaml.cs
+++ b/ChatClient/LoginPage.xaml.cs
@@ -38,11 +38,10 @@ private void LoginBtnClick(object sender, RoutedEventArgs e)
             string password = PasswordTextBox.Password;
 
             LoginModel model = new LoginModel(id, password);
-            RestClient client = new RestClient();
-            RestRequest request = new RestRequest("http://localhost:3000/signIn", Method.Post);
+            RestRequest request = new RestRequest("http://localhost:3000/user/signIn", Method.Post);
             request.AddBody(model);
-            
-            var response = client.Execute<ResponseModel<AccessTokenModel>>(request);
+
+            var response = App.client.Execute<ResponseModel<AccessTokenModel>>(request);
 
             if (response.IsSuccessStatusCode && response.Data?.Options != null)
             {
diff --git a/ChatClient/MainWindow.xaml b/ChatClient/MainWindow.xaml
index 7bdab70..da828ff 100644
--- a/ChatClient/MainWindow.xaml
+++ b/ChatClient/MainWindow.xaml
@@ -13,9 +13,9 @@
         TextOptions.TextRenderingMode="Auto"        
         Background="{DynamicResource MaterialDesignPaper}"
         FontFamily="{DynamicResource MaterialDesignFont}"
-        Title="MainWindow" Height="450" Width="800" MinWidth="300" MinHeight="500">
+        Title="MainWindow" Height="450" Width="800" MinWidth="300" MinHeight="500" WindowStyle="None">
     <Grid>
         <md:Snackbar VerticalAlignment="Top"></md:Snackbar>
-        <Frame x:Name="PageFrame"></Frame>
+        <Frame x:Name="PageFrame" NavigationUIVisibility="Hidden"></Frame>
     </Grid>
 </Window>
diff --git a/ChatClient/Models/AccessTokenModel.cs b/ChatClient/Models/AccessTokenModel.cs
new file mode 100644
index 0000000..bda226a
--- /dev/null
+++ b/ChatClient/Models/AccessTokenModel.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.Json.Serialization;
+using System.Threading.Tasks;
+
+namespace ChatClient.Models
+{
+    public class AccessTokenModel
+    {
+        [JsonPropertyName("token")]
+        public string Token { get; set; }
+        public string RefreshToken { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/ChatClient/Models/LoginModel.cs b/ChatClient/Models/LoginModel.cs
new file mode 100644
index 0000000..0a3965f
--- /dev/null
+++ b/ChatClient/Models/LoginModel.cs
@@ -0,0 +1,20 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChatClient.Models
+{
+    internal class LoginModel
+    {
+        public string Id { get; set; }
+        public string Password { get; set; }
+
+        public LoginModel(string id, string password)
        {
+            Id = id;
+            Password = password;
+        }
+
+    }
+}
diff --git a/ChatClient/Models/ResponseModel.cs b/ChatClient/Models/ResponseModel.cs
new file mode 100644
index 0000000..19852b9
--- /dev/null
+++ b/ChatClient/Models/ResponseModel.cs
@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChatClient.Models
+{
+    internal class ResponseModel<T>
+    {
+        public string Code { get; set; }
+        public string Message { get; set; }
+
+        public T? Options { get; set; }
+    }
+}
diff --git a/ChatClient/Models/SignupModel.cs b/ChatClient/Models/SignupModel.cs
new file mode 100644
index 0000000..ec08b19
--- /dev/null
+++ b/ChatClient/Models/SignupModel.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ChatClient.Models
+{
+    internal class SignupModel
+    {
+        public string Id { get; set; }
+
+        public string Name { get; set; }
+
+        public string Password { get; set; }    
+
+        public SignupModel(string id, string password, string name)
+        {
+            Id = id;
+            Name = name;
+            Password = password;
+        }
+    }
+}
diff --git a/ChatClient/RegisterPage.xaml.cs b/ChatClient/RegisterPage.xaml.cs
index 7e30bd2..cb00335 100644
--- a/ChatClient/RegisterPage.xaml.cs
+++ b/ChatClient/RegisterPage.xaml.cs
@@ -41,17 +41,17 @@ private void RegisterBtnClick(object sender, RoutedEventArgs e)
             string password = PasswordTextBox.Password;
             string passwordConfirm = PasswordConfirmTextBox.Password;
 
+
             if (password != passwordConfirm)
             {
                 MessageBox.Show("비밀번호랑 비밀번호 확인이 달라요!");
             }
-
+            // TODO: 서버에 회원가입 요청 보내기
             SignupModel model = new SignupModel(id, password, username);
-            RestClient client = new RestClient();
-            RestRequest request = new RestRequest("http://localhost:3000/signUp", Method.Post);
+            RestRequest request = new RestRequest("http://localhost:3000/user/signUp", Method.Post);
             request.AddBody(model);
 
-            var response = client.Execute<ResponseModel<JsonObject>>(request);
+            var response = App.client.Execute<ResponseModel<JsonObject>>(request);
 
             if (response.IsSuccessStatusCode && response.Data?.Options != null)
             {