Unity MCP Server

using Newtonsoft.Json; using Newtonsoft.Json.Linq; using UnityEditor; using UnityEngine; namespace UnityMcp { public static class Tools_Editor { public static ToolResult ExecuteMenuItem(JObject args) { var menuPath = args.Value<string>("menuPath"); if (string.IsNullOrEmpty(menuPath)) { return ToolResultUtil.Text("Missing param: menuPath", true); } var ok = EditorApplication.ExecuteMenuItem(menuPath); return ok ? ToolResultUtil.Text($"Executed: {menuPath}") : ToolResultUtil.Text($"Menu item not found or failed: {menuPath}", true); } public static ToolResult Notification(JObject args) { var message = args.Value<string>("message") ?? ""; var duration = args.Value<float?>("duration") ?? 2f; if (SceneView.lastActiveSceneView != null) { SceneView.lastActiveSceneView.ShowNotification(new GUIContent(message), duration); return ToolResultUtil.Text("Notification shown."); } return ToolResultUtil.Text("No active SceneView to show notification.", true); } public static ToolResult Log(JObject args) { var message = args.Value<string>("message") ?? ""; var type = args.Value<string>("type")?.ToLowerInvariant() ?? "log"; switch (type) { case "warning": Debug.LogWarning($"[MCP] {message}"); break; case "error": Debug.LogError($"[MCP] {message}"); break; default: Debug.Log($"[MCP] {message}"); break; } return ToolResultUtil.Text("Logged."); } public static ToolResult GetEditorState(JObject args) { var state = new { isPlaying = EditorApplication.isPlaying, isPaused = EditorApplication.isPaused, isCompiling = EditorApplication.isCompiling, isUpdating = EditorApplication.isUpdating, applicationPath = EditorApplication.applicationPath, applicationContentsPath = EditorApplication.applicationContentsPath, unityVersion = Application.unityVersion, platform = Application.platform.ToString(), systemLanguage = Application.systemLanguage.ToString(), timeSinceStartup = EditorApplication.timeSinceStartup }; return ToolResultUtil.Text(JsonConvert.SerializeObject(state, Formatting.Indented)); } public static ToolResult Pause(JObject args) { var pause = args.Value<bool?>("pause") ?? !EditorApplication.isPaused; EditorApplication.isPaused = pause; return ToolResultUtil.Text($"Editor paused: {pause}"); } public static ToolResult Step(JObject args) { if (!EditorApplication.isPlaying) { return ToolResultUtil.Text("Cannot step when not in play mode.", true); } EditorApplication.Step(); return ToolResultUtil.Text("Stepped one frame."); } } }