feat: add remote host configuration support for Unity WebSocket connection

Editor/UnityBridge/McpUnityEditorWindow.cs

@@ -135,6 +135,19 @@ private void DrawServerTab()
 
             EditorGUILayout.Space();
 
+            // Allow remote connections toggle
+            bool allowRemoteConnections = EditorGUILayout.Toggle(new GUIContent("Allow Remote Connections", "Allow connections from remote MCP bridges. When disabled, only localhost connections are allowed (default)."), settings.AllowRemoteConnections);
+            if (allowRemoteConnections != settings.AllowRemoteConnections)
+            {
+                settings.AllowRemoteConnections = allowRemoteConnections;
+                settings.SaveSettings();
+                // Restart server to apply binding change
+                mcpUnityServer.StopServer();
+                mcpUnityServer.StartServer();
+            }
+
+            EditorGUILayout.Space();
+
             // Enable info logs toggle
             bool enableInfoLogs = EditorGUILayout.Toggle(new GUIContent("Enable Info Logs", "Show informational logs in the Unity console"), settings.EnableInfoLogs);
             if (enableInfoLogs != settings.EnableInfoLogs)

Editor/UnityBridge/McpUnityServer.cs

@@ -125,10 +125,11 @@ public void StartServer()
 
             try
             {
-                _webSocketServer = new WebSocketServer($"ws://localhost:{McpUnitySettings.Instance.Port}");
+                var host = McpUnitySettings.Instance.AllowRemoteConnections ? "0.0.0.0" : "localhost";
+                _webSocketServer = new WebSocketServer($"ws://{host}:{McpUnitySettings.Instance.Port}");
                 _webSocketServer.AddWebSocketService("/McpUnity", () => new McpUnitySocketHandler(this));
                 _webSocketServer.Start();
-                McpLogger.LogInfo($"WebSocket server started successfully on port {McpUnitySettings.Instance.Port}.");
+                McpLogger.LogInfo($"WebSocket server started successfully on {host}:{McpUnitySettings.Instance.Port}.");
             }
             catch (SocketException ex) when (ex.SocketErrorCode == SocketError.AddressAlreadyInUse)
             {

Editor/UnityBridge/McpUnitySettings.cs

@@ -36,6 +36,9 @@ public class McpUnitySettings
 
         [Tooltip("Optional: Full path to the npm executable (e.g., /Users/user/.asdf/shims/npm or C:\\path\\to\\npm.cmd). If not set, 'npm' from the system PATH will be used.")]
         public string NpmExecutablePath = string.Empty;
+
+        [Tooltip("Allow connections from remote MCP bridges. When disabled, only localhost connections are allowed (default).")]
+        public bool AllowRemoteConnections = false;
 
         /// <summary>
         /// Singleton instance of settings

README-ja.md

@@ -255,6 +255,18 @@ MCP Unityサーバーを起動するには2つの方法があります：
 > [!TIP]  
 > AIコーディングIDE（Claude Desktop、Cursor IDE、Windsurf IDEなど）とMCPサーバー間のタイムアウトは、使用するIDEによって異なる場合があります。
 
+## オプション：リモート MCP ブリッジ接続を許可する
+
+デフォルトでは、WebSocket サーバーは 'localhost' にバインドされています。他のマシンから MCP ブリッジ接続を許可するには、以下の手順に従ってください：
+
+1. Unity エディターを開く  
+2. メニューから「Tools > MCP Unity > Server Window」を選択  
+3. 「Allow Remote Connections（リモート接続を許可）」チェックボックスを有効にする  
+4. Unity は WebSocket サーバーを '0.0.0.0'（すべてのインターフェース）にバインドします  
+5. Node.js サーバーを再起動して新しいホスト設定を適用する  
+6. リモートで MCP ブリッジを実行する場合は、環境変数 UNITY_HOST を Unity 実行マシンの IP アドレスに設定して起動：  
+   `UNITY_HOST=192.168.1.100 node server.js`
+
 ## サポート & フィードバック
 
 ご質問やサポートが必要な場合は、このリポジトリの[Issue](https://github.com/CoderGamester/mcp-unity/issues)を開くか、以下までご連絡ください：

README.md

@@ -245,6 +245,17 @@ You can change depending on the OS you are using:
 > [!TIP]  
 > The timeout between your AI Coding IDE (e.g., Claude Desktop, Cursor IDE, Windsurf IDE) and the MCP Server depends on the IDE.
 
+## Optional: Allow Remote MCP Bridge Connections
+
+By default, the WebSocket server binds to 'localhost'. To allow MCP bridge connections from other machines:
+
+1. Open the Unity Editor
+2. Navigate to Tools > MCP Unity > Server Window
+3. Enable the "Allow Remote Connections" checkbox
+4. Unity will bind the WebSocket server to '0.0.0.0' (all interfaces)
+5. Restart the Node.js server to apply the new host configuration
+6. Set the environment variable UNITY_HOST to your Unity machine's IP address when running the MCP bridge remotely: `UNITY_HOST=192.168.1.100 node server.js`
+
 ## <a name="debug-server"></a>Debugging the Server
 
 <details>

README_zh-CN.md

@@ -244,6 +244,18 @@ MCP Unity 通过将 Unity `Library/PackedCache` 文件夹添加到您的工作
 > [!TIP]  
 > 您的 AI 编码 IDE（例如 Claude Desktop、Cursor IDE、Windsurf IDE）与 MCP 服务器之间的超时时间取决于 IDE。
 
+## 可选：允许远程 MCP Bridge 连接
+
+默认情况下，WebSocket 服务器绑定到 'localhost'。要允许来自其他设备的 MCP Bridge 连接，请执行以下步骤：
+
+1. 打开 Unity 编辑器  
+2. 依次点击菜单「Tools > MCP Unity > Server Window」  
+3. 勾选"Allow Remote Connections（允许远程连接）"复选框  
+4. Unity 将 WebSocket 服务器绑定到 '0.0.0.0'（所有网络接口）  
+5. 重新启动 Node.js 服务器以应用新的主机配置  
+6. 在远程运行 MCP Bridge 时，将环境变量 UNITY_HOST 设置为 Unity 所在机器的 IP 地址：  
+   `UNITY_HOST=192.168.1.100 node server.js`
+
 ## <a name="debug-server"></a>调试服务器
 
 <details>

Server~/src/unity/mcpUnity.ts

@@ -34,6 +34,7 @@ interface UnityResponse {
 export class McpUnity {
   private logger: Logger;
   private port: number | null = null;
+  private host: string = 'localhost';
   private ws: WebSocket | null = null;
   private pendingRequests: Map<string, PendingRequest> = new Map<string, PendingRequest>();
   private requestTimeout = 10000;
@@ -80,6 +81,10 @@ export class McpUnity {
     this.port = configPort ? parseInt(configPort, 10) : 8090;
     this.logger.info(`Using port: ${this.port} for Unity WebSocket connection`);
 
+    // Check environment variable first, then config file, then default to localhost
+    const configHost = process.env.UNITY_HOST || config.Host;
+    this.host = configHost || 'localhost';
+
     // Initialize timeout from environment variable (in seconds; it is the same as Cline) or use default (10 seconds)
     const configTimeout = config.RequestTimeoutSeconds;
     this.requestTimeout = configTimeout ? parseInt(configTimeout, 10) * 1000 : 10000;
@@ -100,7 +105,7 @@ export class McpUnity {
     this.disconnect();
 
     return new Promise<void>((resolve, reject) => {
-      const wsUrl = `ws://localhost:${this.port}/McpUnity`;
+      const wsUrl = `ws://${this.host}:${this.port}/McpUnity`;
       this.logger.debug(`Connecting to ${wsUrl}...`);
 
       // Create connection options with headers for client identification