diff --git a/src/components/MainView.tsx b/src/components/MainView.tsx
index d9594bc..3f1db7e 100644
--- a/src/components/MainView.tsx
+++ b/src/components/MainView.tsx
@@ -22,6 +22,7 @@ import { ModToolsView } from './mod-tools/ModToolsView';
 import { NavigatorView } from './navigator/NavigatorView';
 import { NitrobubbleHiddenView } from './nitrobubblehidden/NitrobubbleHiddenView';
 import { NitropediaView } from './nitropedia/NitropediaView';
+import { ExternalPluginLoader } from './plugins/ExternalPluginLoader';
 import { RightSideView } from './right-side/RightSideView';
 import { RoomView } from './room/RoomView';
 import { ToolbarView } from './toolbar/ToolbarView';
@@ -118,6 +119,7 @@ export const MainView: FC<{}> = props =>
             <FloorplanEditorView />
             <FurniEditorView />
             <YoutubeTvView />
+            <ExternalPluginLoader />
         </>
     );
 };
diff --git a/src/components/plugins/ExternalPluginLoader.tsx b/src/components/plugins/ExternalPluginLoader.tsx
new file mode 100644
index 0000000..b97fb41
--- /dev/null
+++ b/src/components/plugins/ExternalPluginLoader.tsx
@@ -0,0 +1,61 @@
+import { FC, useEffect, useState } from 'react';
+import { GetConfigurationValue } from '../../api';
+import { subscribePlugins } from './NitroPluginApi';
+
+// Force the global API to be initialized
+import './NitroPluginApi';
+
+export const ExternalPluginLoader: FC<{}> = () =>
+{
+    const [, forceUpdate] = useState(0);
+
+    useEffect(() =>
+    {
+        return subscribePlugins(() => forceUpdate(n => n + 1));
+    }, []);
+
+    // MainView only renders after isReady=true in App.tsx,
+    // so the configuration is guaranteed to be loaded at this point.
+    useEffect(() =>
+    {
+        const scripts: HTMLScriptElement[] = [];
+
+        let pluginUrls: string[] = [];
+
+        try
+        {
+            pluginUrls = GetConfigurationValue<string[]>('external.plugins', []);
+        }
+        catch (e)
+        {
+            console.warn('[NitroPlugins] Could not read external.plugins config:', e);
+            return;
+        }
+
+        if (!pluginUrls || pluginUrls.length === 0)
+        {
+            console.log('[NitroPlugins] No external plugins configured');
+            return;
+        }
+
+        console.log('[NitroPlugins] Loading external plugins:', pluginUrls);
+
+        for (const url of pluginUrls)
+        {
+            const script = document.createElement('script');
+            script.src = url;
+            script.async = true;
+            script.onload = () => console.log(`[NitroPlugins] Loaded: ${url}`);
+            script.onerror = () => console.warn(`[NitroPlugins] Failed to load: ${url}`);
+            document.head.appendChild(script);
+            scripts.push(script);
+        }
+
+        return () =>
+        {
+            scripts.forEach(s => s.remove());
+        };
+    }, []);
+
+    return null;
+};
diff --git a/src/components/plugins/NitroPluginApi.ts b/src/components/plugins/NitroPluginApi.ts
new file mode 100644
index 0000000..d52ffa0
--- /dev/null
+++ b/src/components/plugins/NitroPluginApi.ts
@@ -0,0 +1,193 @@
+import { GetRoomEngine } from '@nitrots/nitro-renderer';
+import { CreateLinkEvent, GetRoomSession, SendMessageComposer } from '../../api';
+
+/**
+ * Plugin descriptor registered by external plugin scripts.
+ */
+export interface INitroPlugin
+{
+    /** Unique plugin name */
+    name: string;
+    /** Label shown on the button in room tools */
+    label: string;
+    /** CSS class for the icon (nitro-icon class) */
+    icon?: string;
+    /** Called when the plugin button is clicked */
+    onOpen: () => void;
+    /** Called to close/destroy the plugin UI */
+    onClose?: () => void;
+    /** Called when the plugin is first loaded, receives the Nitro API */
+    onInit?: (api: INitroPluginApi) => void;
+}
+
+/**
+ * API exposed to external plugins via window.NitroPlugins
+ */
+export interface INitroPluginApi
+{
+    /** Register a plugin */
+    register: (plugin: INitroPlugin) => void;
+    /** Unregister a plugin by name */
+    unregister: (name: string) => void;
+    /** Get all registered plugins */
+    getPlugins: () => INitroPlugin[];
+    /** Fire a Nitro link event (e.g., 'navigator/toggle-room-info') */
+    createLinkEvent: (link: string) => void;
+    /** Get the room engine instance */
+    getRoomEngine: () => ReturnType<typeof GetRoomEngine>;
+    /** Get the current room session */
+    getRoomSession: () => ReturnType<typeof GetRoomSession>;
+    /** Send a message composer to the server */
+    sendMessage: typeof SendMessageComposer;
+    /** Create a draggable floating window and return its container element */
+    createWindow: (id: string, title: string, width: number) => HTMLDivElement | null;
+    /** Destroy a floating window by id */
+    destroyWindow: (id: string) => void;
+}
+
+// Internal plugin storage
+const _plugins: INitroPlugin[] = [];
+const _listeners: Array<() => void> = [];
+
+function notifyListeners()
+{
+    _listeners.forEach(fn => fn());
+}
+
+const pluginApi: INitroPluginApi = {
+    register(plugin: INitroPlugin)
+    {
+        if (_plugins.some(p => p.name === plugin.name)) return;
+        _plugins.push(plugin);
+        plugin.onInit?.(pluginApi);
+        notifyListeners();
+    },
+
+    unregister(name: string)
+    {
+        const index = _plugins.findIndex(p => p.name === name);
+        if (index >= 0)
+        {
+            _plugins[index].onClose?.();
+            _plugins.splice(index, 1);
+            notifyListeners();
+        }
+    },
+
+    getPlugins()
+    {
+        return [..._plugins];
+    },
+
+    createLinkEvent(link: string)
+    {
+        CreateLinkEvent(link);
+    },
+
+    getRoomEngine()
+    {
+        return GetRoomEngine();
+    },
+
+    getRoomSession()
+    {
+        return GetRoomSession();
+    },
+
+    sendMessage: SendMessageComposer,
+
+    createWindow(id: string, title: string, width: number): HTMLDivElement | null
+    {
+        // Remove existing window with same id
+        pluginApi.destroyWindow(id);
+
+        // Create overlay container
+        const overlay = document.createElement('div');
+        overlay.id = `nitro-plugin-window-${id}`;
+        overlay.style.cssText = `position:fixed;z-index:500;top:50%;left:50%;transform:translate(-50%,-50%)`;
+
+        // Card wrapper
+        const card = document.createElement('div');
+        card.style.cssText = `width:${width}px;background:#2c3e50;border:1px solid #283F5D;border-radius:6px;box-shadow:0 8px 32px rgba(0,0,0,0.5);overflow:hidden;font-family:Ubuntu,sans-serif`;
+
+        // Header (draggable)
+        const header = document.createElement('div');
+        header.style.cssText = `display:flex;align-items:center;justify-content:center;position:relative;min-height:33px;background:linear-gradient(180deg,#3c6a8e 0%,#2a4f6e 100%);cursor:move;user-select:none`;
+
+        const titleEl = document.createElement('span');
+        titleEl.textContent = title;
+        titleEl.style.cssText = `color:#fff;font-size:16px;text-shadow:0 1px 2px rgba(0,0,0,0.5)`;
+
+        const closeBtn = document.createElement('div');
+        closeBtn.style.cssText = `position:absolute;right:8px;width:20px;height:20px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;border-radius:50%;background:rgba(255,255,255,0.1)`;
+        closeBtn.innerHTML = '✕';
+        closeBtn.addEventListener('click', () => pluginApi.destroyWindow(id));
+
+        header.appendChild(titleEl);
+        header.appendChild(closeBtn);
+
+        // Make draggable
+        let isDragging = false;
+        let offsetX = 0, offsetY = 0;
+
+        header.addEventListener('mousedown', (e: MouseEvent) =>
+        {
+            isDragging = true;
+            const rect = overlay.getBoundingClientRect();
+            offsetX = e.clientX - rect.left;
+            offsetY = e.clientY - rect.top;
+            overlay.style.transform = 'none';
+            overlay.style.left = rect.left + 'px';
+            overlay.style.top = rect.top + 'px';
+        });
+
+        document.addEventListener('mousemove', (e: MouseEvent) =>
+        {
+            if (!isDragging) return;
+            overlay.style.left = (e.clientX - offsetX) + 'px';
+            overlay.style.top = (e.clientY - offsetY) + 'px';
+        });
+
+        document.addEventListener('mouseup', () => { isDragging = false; });
+
+        // Content area
+        const content = document.createElement('div');
+        content.style.cssText = `padding:16px`;
+
+        card.appendChild(header);
+        card.appendChild(content);
+        overlay.appendChild(card);
+        document.body.appendChild(overlay);
+
+        return content;
+    },
+
+    destroyWindow(id: string)
+    {
+        const existing = document.getElementById(`nitro-plugin-window-${id}`);
+        if (existing) existing.remove();
+    }
+};
+
+/**
+ * Subscribe to plugin list changes. Returns unsubscribe function.
+ */
+export function subscribePlugins(listener: () => void): () => void
+{
+    _listeners.push(listener);
+    return () =>
+    {
+        const idx = _listeners.indexOf(listener);
+        if (idx >= 0) _listeners.splice(idx, 1);
+    };
+}
+
+export function getRegisteredPlugins(): INitroPlugin[]
+{
+    return [..._plugins];
+}
+
+// Expose globally so external scripts can use it
+(window as any).NitroPlugins = pluginApi;
+
+export { pluginApi };