feat: add API key authentication for /v1/* endpoints

README.md

@@ -332,6 +332,7 @@ While most users can use the default settings, you can tune the proxy behavior v
 
 ### Configurable Options
 
+- **API Key Authentication**: Protect `/v1/*` API endpoints with `API_KEY` env var or `apiKey` in config.
 - **WebUI Password**: Secure your dashboard with `WEBUI_PASSWORD` env var or in config.
 - **Custom Port**: Change the default `8080` port.
 - **Retry Logic**: Configure `maxRetries`, `retryBaseMs`, and `retryMaxMs`.

config.example.json

@@ -11,6 +11,9 @@
     "Restart server after making changes"
   ],
 
+  "apiKey": "",
+  "_apiKey_comment": "Optional API key to protect /v1/* endpoints. Can also use API_KEY env var.",
+
   "webuiPassword": "",
   "_webuiPassword_comment": "Optional password to protect WebUI. Can also use WEBUI_PASSWORD env var.",
 

src/config.js

@@ -5,6 +5,7 @@ import { logger } from './utils/logger.js';
 
 // Default config
 const DEFAULT_CONFIG = {
+    apiKey: '',
     webuiPassword: '',
     debug: false,
     logLevel: 'info',
@@ -54,6 +55,7 @@ function loadConfig() {
         }
 
         // Environment overrides
+        if (process.env.API_KEY) config.apiKey = process.env.API_KEY;
         if (process.env.WEBUI_PASSWORD) config.webuiPassword = process.env.WEBUI_PASSWORD;
         if (process.env.DEBUG === 'true') config.debug = true;
 

src/server.js

@@ -65,6 +65,37 @@ async function ensureInitialized() {
 app.use(cors());
 app.use(express.json({ limit: REQUEST_BODY_LIMIT }));
 
+// API Key authentication middleware for /v1/* endpoints
+app.use('/v1', (req, res, next) => {
+    // Skip validation if apiKey is not configured
+    if (!config.apiKey) {
+        return next();
+    }
+
+    const authHeader = req.headers['authorization'];
+    const xApiKey = req.headers['x-api-key'];
+
+    let providedKey = '';
+    if (authHeader && authHeader.startsWith('Bearer ')) {
+        providedKey = authHeader.substring(7);
+    } else if (xApiKey) {
+        providedKey = xApiKey;
+    }
+
+    if (!providedKey || providedKey !== config.apiKey) {
+        logger.warn(`[API] Unauthorized request from ${req.ip}, invalid API key`);
+        return res.status(401).json({
+            type: 'error',
+            error: {
+                type: 'authentication_error',
+                message: 'Invalid or missing API key'
+            }
+        });
+    }
+
+    next();
+});
+
 // Setup usage statistics middleware
 usageStats.setupMiddleware(app);