diff --git a/client/api/ApiCallbackMessage.ts b/client/api/ApiCallbackMessage.ts
new file mode 100644
index 0000000..185651b
--- /dev/null
+++ b/client/api/ApiCallbackMessage.ts
@@ -0,0 +1,14 @@
+type ApiCallbackMessage = {
+    msg: string,
+    /**
+     * 200: 成功
+     * 400: 伺服器端無法理解客戶端請求
+     * 401: 需要身份驗證
+     * 403: 伺服器端拒絕執行客戶端請求
+     * 404: Not Found
+     * 500: 伺服器端錯誤
+     * 501: 伺服器端不支持請求的功能
+     */
+    code: 200 | 400 | 401 | 403 | 404 | 500 | 501,
+}
+export default ApiCallbackMessage
diff --git a/client/api/ApiDeclare.ts b/client/api/ApiDeclare.ts
new file mode 100644
index 0000000..a907e67
--- /dev/null
+++ b/client/api/ApiDeclare.ts
@@ -0,0 +1,3 @@
+export type CallMethod = 
+    "User.register" |
+    "User.login"
diff --git a/client/api/Client.ts b/client/api/Client.ts
index 983ea07..55a7d14 100644
--- a/client/api/Client.ts
+++ b/client/api/Client.ts
@@ -1,4 +1,6 @@
 import { io, Socket } from 'https://unpkg.com/socket.io-client@4.8.1/dist/socket.io.esm.min.js'
+import { CallMethod } from './ApiDeclare.ts'
+import ApiCallbackMessage from './ApiCallbackMessage.ts'
 
 class Client {
     static socket: Socket
@@ -6,6 +8,14 @@ class Client {
         this.socket && this.socket.disconnect()
         this.socket = io()
     }
+    static call(method: CallMethod, args: {}, timeout: number = 5000) {
+        return new Promise((resolve, reject) => {
+            this.socket.timeout().emit("The_White_Silk", (err, res: ApiCallbackMessage) => {
+                if (err) return reject(err)
+                
+            })
+        })
+    }
 }
 
 export default Client