diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e5601e8
--- /dev/null
+++ b/README.md
@@ -0,0 +1,44 @@
+# File Manager API Server
+
+## Kuvaus
+ApiServer tarjoaa turvallisen rajapinnan tiedostonhallinnan toimintoihin. Kaikki kutsut vaativat API-avaimen.
+
+## Käynnistys
+```bash
+cd ApiServer
+npm install
+npm run dev
+```
+
+## Ympäristömuuttujat (.env)
+- `PORT`: Palvelimen portti (oletus: 3001)
+- `API_KEY`: API-avain, jota vaaditaan kaikissa kutsuissa
+- `NODE_ENV`: Ympäristö (development/production)
+
+## Autentikointi
+Kaikki API-kutsut vaativat Authorization-headerin:
+```
+Authorization: Bearer YOUR_API_KEY
+```
+
+## Endpointit
+
+### GET /api/v1/health
+Terveystarkistus - palauttaa palvelimen tilan.
+
+### GET /api/v1/server-info
+Palauttaa palvelimen tiedot ja ominaisuudet.
+
+### GET /api/v1/servers
+Palauttaa listan hallinnoiduista palvelimista.
+
+### GET /api/v1/servers/:id
+Palauttaa tietyn palvelimen tiedot.
+
+### POST /api/v1/servers/:id/test
+Testaa yhteyden tiettyyn palvelimeen.
+
+## Tietoturva
+- Kaikki kutsut vaativat kelvollisen API-avaimen
+- Virheelliset API-avaimet palauttavat 401 Unauthorized
+- Kaikki kutsut lokitetaan
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..2678c9d
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,876 @@
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+      "integrity": "sha512-pMZTvIkT1d+TFGvDOqodOclx0QWkkgi6Tdoa8gC8ffGAAqz9pzPTZWAybbsHHoED/ztMtkv/VoYTYyShUn81hA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/vary": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
+      "integrity": "sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    }
+  }
+}
diff --git a/server.js b/server.js
new file mode 100644
index 0000000..1828018
--- /dev/null
+++ b/server.js
@@ -0,0 +1,1117 @@
+import express from 'express';
+import cors from 'cors';
+import dotenv from 'dotenv';
+import crypto from 'crypto';
+import fs from 'fs/promises';
+import path from 'path';
+
+dotenv.config();
+
+const app = express();
+const CONFIG_FILE = path.join(process.cwd(), 'config.json');
+
+// Load configuration
+let config = {};
+
+async function loadConfig() {
+  try {
+    const configData = await fs.readFile(CONFIG_FILE, 'utf8');
+    const newConfig = JSON.parse(configData);
+    
+    // Check if root directory changed
+    const oldRootDirectory = config.server?.rootDirectory;
+    const newRootDirectory = newConfig.server?.rootDirectory;
+    
+    config = newConfig;
+    console.log('✅ API Server: Configuration loaded successfully');
+    
+    // If root directory changed, refresh file system cache
+    if (oldRootDirectory && newRootDirectory && oldRootDirectory !== newRootDirectory) {
+      console.log(`📁 API Server: Root directory changed from ${oldRootDirectory} to ${newRootDirectory}`);
+      console.log('🔄 API Server: Refreshing file system cache...');
+      await refreshFileSystemCache();
+    }
+    
+    return config;
+  } catch (error) {
+    console.error('❌ API Server: Error loading config:', error.message);
+    // Create default config if file doesn't exist
+    config = {
+      server: {
+        name: "File Manager API Server",
+        port: 3001,
+        rootDirectory: "/home/project",
+        logLevel: "info",
+        environment: "development",
+        capabilities: [
+          "file-transfer",
+          "server-management", 
+          "health-monitoring",
+          "filesystem-browsing"
+        ]
+      },
+      filesystem: {
+        maxDepth: 10,
+        cacheSettings: {
+          ttl: 60000,
+          refreshInterval: 300000
+        },
+        watchEnabled: true,
+        maxFileSize: 104857600
+      },
+      transfer: {
+        maxConcurrentTransfers: 5,
+        uploadTimeout: 300000,
+        maxRequestSize: 104857600
+      },
+      security: {
+        corsOrigins: [
+          "http://localhost:3000",
+          "http://localhost:5173"
+        ],
+        requestTimeout: 30000,
+        rateLimiting: {
+          windowMs: 900000,
+          maxRequests: 1000
+        }
+      },
+      logging: {
+        requests: true,
+        errors: true,
+        filePath: "./logs/api-server.log"
+      },
+      health: {
+        checkEnabled: true,
+        checkInterval: 60000
+      }
+    };
+    await saveConfig();
+    return config;
+  }
+}
+
+async function saveConfig() {
+  try {
+    await fs.writeFile(CONFIG_FILE, JSON.stringify(config, null, 2), 'utf8');
+    console.log('✅ API Server: Configuration saved successfully');
+    return true;
+  } catch (error) {
+    console.error('❌ API Server: Error saving config:', error.message);
+    return false;
+  }
+}
+
+// Watch config file for changes
+async function watchConfigFile() {
+  try {
+    const { watch } = await import('fs');
+    
+    console.log('👁️ API Server: Starting config file watcher...');
+    
+    const watcher = watch(CONFIG_FILE, { persistent: false }, async (eventType, filename) => {
+      if (eventType === 'change' && filename === 'config.json') {
+        console.log('📝 API Server: Config file changed, reloading...');
+        
+        // Add a small delay to ensure file write is complete
+        setTimeout(async () => {
+          try {
+            await loadConfig();
+            console.log('✅ API Server: Configuration reloaded successfully');
+          } catch (error) {
+            console.error('❌ API Server: Error reloading configuration:', error.message);
+          }
+        }, 100);
+      }
+    });
+
+    watcher.on('error', (error) => {
+      console.error('❌ API Server: Config file watcher error:', error.message);
+    });
+
+    console.log('✅ API Server: Config file watcher started');
+    return watcher;
+  } catch (error) {
+    console.error('❌ API Server: Failed to start config file watcher:', error.message);
+    return null;
+  }
+}
+
+// Get current configuration
+function getConfig() {
+  return config;
+}
+
+const API_KEY = process.env.API_KEY;
+const PORT = process.env.PORT || config.server?.port || 3001;
+
+// Middleware
+app.use(cors({
+  origin: config.security?.corsOrigins || ["http://localhost:3000", "http://localhost:5173"],
+  credentials: true
+}));
+app.use(express.json());
+
+// API Key validation middleware
+const validateApiKey = (req, res, next) => {
+  const authHeader = req.headers.authorization;
+  
+  if (!authHeader) {
+    return res.status(401).json({
+      success: false,
+      error: 'Authorization header missing'
+    });
+  }
+
+  const token = authHeader.replace('Bearer ', '');
+  
+  if (token !== API_KEY) {
+    return res.status(401).json({
+      success: false,
+      error: 'Invalid API key'
+    });
+  }
+
+  next();
+};
+
+// Request logging middleware
+app.use((req, res, next) => {
+  if (config.logging?.requests) {
+    const timestamp = new Date().toISOString();
+    console.log(`[${timestamp}] API Server: ${req.method} ${req.path} - ${req.ip}`);
+  }
+  next();
+});
+
+// File system cache
+let fileSystemCache = {
+  data: null,
+  lastUpdate: null,
+  ttl: config.filesystem?.cacheSettings?.ttl || 60000
+};
+
+// Helper function to resolve file path correctly
+function resolveFilePath(relativePath) {
+  const rootDir = config.server.rootDirectory;
+  
+  // If relativePath is already absolute and starts with rootDir, use it as is
+  if (path.isAbsolute(relativePath) && relativePath.startsWith(rootDir)) {
+    return relativePath;
+  }
+  
+  // If relativePath is absolute but doesn't start with rootDir, 
+  // treat it as relative to rootDir
+  if (path.isAbsolute(relativePath)) {
+    // Remove leading slash and join with rootDir
+    const cleanPath = relativePath.startsWith('/') ? relativePath.slice(1) : relativePath;
+    return path.join(rootDir, cleanPath);
+  }
+  
+  // If relativePath is relative, join with rootDir
+  return path.join(rootDir, relativePath);
+}
+
+// Helper function to get relative path from absolute path
+function getRelativePath(absolutePath) {
+  const rootDir = config.server.rootDirectory;
+  
+  // If path starts with rootDir, remove it to get relative path
+  if (absolutePath.startsWith(rootDir)) {
+    const relativePath = absolutePath.slice(rootDir.length);
+    return relativePath.startsWith('/') ? relativePath : '/' + relativePath;
+  }
+  
+  // If path doesn't start with rootDir, return as is
+  return absolutePath;
+}
+
+// Dangerous directories to skip when scanning from root
+const DANGEROUS_DIRECTORIES = new Set([
+  '/proc',
+  '/sys',
+  '/dev',
+  '/run',
+  '/tmp',
+  '/var/run',
+  '/var/lock',
+  '/var/tmp',
+  '/boot',
+  '/lost+found'
+]);
+
+// Helper function to check if directory should be skipped
+function shouldSkipDirectory(dirPath) {
+  // Skip dangerous system directories
+  if (DANGEROUS_DIRECTORIES.has(dirPath)) {
+    return true;
+  }
+  
+  // Skip any subdirectories of dangerous directories
+  for (const dangerousDir of DANGEROUS_DIRECTORIES) {
+    if (dirPath.startsWith(dangerousDir + '/')) {
+      return true;
+    }
+  }
+  
+  // Skip hidden directories when scanning from root
+  const rootDir = config.server.rootDirectory;
+  if (rootDir === '/' && path.basename(dirPath).startsWith('.')) {
+    return true;
+  }
+  
+  return false;
+}
+
+// Helper function to get file stats safely
+async function getFileStats(filePath) {
+  try {
+    const stats = await fs.stat(filePath);
+    return {
+      isDirectory: stats.isDirectory(),
+      isFile: stats.isFile(),
+      size: stats.size,
+      lastModified: stats.mtime,
+      created: stats.birthtime,
+      permissions: stats.mode
+    };
+  } catch (error) {
+    return null;
+  }
+}
+
+// Helper function to scan directory recursively with safety limits
+async function scanDirectory(dirPath, currentDepth = 0, maxDepth = 10) {
+  if (currentDepth >= maxDepth) {
+    console.log(`⚠️ API Server: Max depth ${maxDepth} reached for ${dirPath}`);
+    return [];
+  }
+
+  // Check if directory should be skipped for safety
+  if (shouldSkipDirectory(dirPath)) {
+    console.log(`⚠️ API Server: Skipping dangerous directory: ${dirPath}`);
+    return [];
+  }
+
+  try {
+    const entries = await fs.readdir(dirPath);
+    const files = [];
+    let processedCount = 0;
+    const maxEntriesPerDirectory = 1000; // Limit entries per directory
+
+    for (const entry of entries) {
+      // Limit number of entries processed per directory
+      if (processedCount >= maxEntriesPerDirectory) {
+        console.log(`⚠️ API Server: Directory ${dirPath} has too many entries, limiting to ${maxEntriesPerDirectory}`);
+        break;
+      }
+
+      const fullPath = path.join(dirPath, entry);
+      
+      // Skip dangerous directories
+      if (shouldSkipDirectory(fullPath)) {
+        continue;
+      }
+
+      const stats = await getFileStats(fullPath);
+      
+      if (!stats) continue;
+
+      const relativePath = getRelativePath(fullPath);
+
+      const fileItem = {
+        id: crypto.randomUUID(),
+        name: entry,
+        path: relativePath,
+        type: stats.isDirectory ? 'folder' : 'file',
+        size: stats.isFile ? stats.size : undefined,
+        lastModified: stats.lastModified,
+        created: stats.created,
+        permissions: stats.permissions
+      };
+
+      if (stats.isDirectory && currentDepth < maxDepth - 1) {
+        try {
+          fileItem.children = await scanDirectory(fullPath, currentDepth + 1, maxDepth);
+        } catch (error) {
+          console.warn(`⚠️ API Server: Cannot read directory ${fullPath}: ${error.message}`);
+          fileItem.children = [];
+        }
+      }
+
+      files.push(fileItem);
+      processedCount++;
+    }
+
+    return files.sort((a, b) => {
+      // Folders first, then files, both alphabetically
+      if (a.type !== b.type) {
+        return a.type === 'folder' ? -1 : 1;
+      }
+      return a.name.localeCompare(b.name);
+    });
+  } catch (error) {
+    console.error(`❌ API Server: Error scanning directory ${dirPath}: ${error.message}`);
+    return [];
+  }
+}
+
+// Helper function to refresh file system cache with safety limits
+async function refreshFileSystemCache() {
+  try {
+    const rootDir = config.server.rootDirectory;
+    console.log(`🔍 API Server: Scanning file system from root: ${rootDir}`);
+    
+    // Special handling for root directory
+    if (rootDir === '/') {
+      console.log(`⚠️ API Server: Root directory is '/', applying safety limits`);
+    }
+    
+    const startTime = Date.now();
+    
+    // Use reduced max depth for root directory scanning
+    const maxDepth = rootDir === '/' ? 3 : (config.filesystem?.maxDepth || 10);
+    console.log(`📊 API Server: Using max depth: ${maxDepth}`);
+    
+    const files = await scanDirectory(rootDir, 0, maxDepth);
+    
+    fileSystemCache = {
+      data: files,
+      lastUpdate: new Date().toISOString(),
+      ttl: config.filesystem?.cacheSettings?.ttl || 60000,
+      scanTime: Date.now() - startTime,
+      totalFiles: countFiles(files),
+      rootDirectory: rootDir,
+      maxDepth: maxDepth
+    };
+
+    console.log(`✅ API Server: File system scan completed in ${fileSystemCache.scanTime}ms, found ${fileSystemCache.totalFiles} items`);
+    return true;
+  } catch (error) {
+    console.error('❌ API Server: Error refreshing file system cache:', error);
+    return false;
+  }
+}
+
+// Helper function to count files recursively
+function countFiles(files) {
+  let count = 0;
+  for (const file of files) {
+    count++;
+    if (file.children) {
+      count += countFiles(file.children);
+    }
+  }
+  return count;
+}
+
+// Check if cache is valid
+function isCacheValid() {
+  if (!fileSystemCache.data || !fileSystemCache.lastUpdate) {
+    return false;
+  }
+  
+  const now = Date.now();
+  const lastUpdate = new Date(fileSystemCache.lastUpdate).getTime();
+  return (now - lastUpdate) < fileSystemCache.ttl;
+}
+
+// Mock data for servers (keeping existing functionality)
+const mockServers = [
+  {
+    id: 'server1',
+    name: 'Production Server',
+    address: '192.168.1.100',
+    port: 22,
+    type: 'sftp',
+    status: 'online',
+    lastSeen: new Date().toISOString()
+  },
+  {
+    id: 'server2',
+    name: 'Development Server',
+    address: '192.168.1.101',
+    port: 22,
+    type: 'sftp',
+    status: 'offline',
+    lastSeen: new Date(Date.now() - 3600000).toISOString()
+  }
+];
+
+// Routes
+
+// Get configuration
+app.get('/api/v1/config', validateApiKey, (req, res) => {
+  res.json({
+    success: true,
+    data: config
+  });
+});
+
+// Update configuration
+app.post('/api/v1/config', validateApiKey, async (req, res) => {
+  try {
+    const updates = req.body;
+    
+    // Deep merge configuration
+    function deepMerge(target, source) {
+      for (const key in source) {
+        if (source[key] && typeof source[key] === 'object' && !Array.isArray(source[key])) {
+          if (!target[key]) target[key] = {};
+          deepMerge(target[key], source[key]);
+        } else {
+          target[key] = source[key];
+        }
+      }
+    }
+    
+    const oldRootDirectory = config.server?.rootDirectory;
+    deepMerge(config, updates);
+    
+    const saved = await saveConfig();
+    if (saved) {
+      // Refresh file system if root directory changed
+      const newRootDirectory = config.server?.rootDirectory;
+      if (oldRootDirectory !== newRootDirectory) {
+        console.log(`📁 API Server: Root directory updated from ${oldRootDirectory} to ${newRootDirectory}`);
+        await refreshFileSystemCache();
+      }
+      
+      res.json({
+        success: true,
+        message: 'Configuration updated successfully',
+        data: config
+      });
+    } else {
+      res.status(500).json({
+        success: false,
+        error: 'Failed to save configuration'
+      });
+    }
+  } catch (error) {
+    res.status(500).json({
+      success: false,
+      error: 'Failed to update configuration',
+      details: error.message
+    });
+  }
+});
+
+// Update root directory
+app.post('/api/v1/config/root-directory', validateApiKey, async (req, res) => {
+  try {
+    const { rootDirectory } = req.body;
+    
+    console.log(`📡 API Server: Received root directory update request`);
+    console.log(`📡 API Server: Request body:`, req.body);
+    console.log(`📡 API Server: Headers:`, req.headers);
+    
+    if (!rootDirectory) {
+      console.log(`❌ API Server: Root directory is missing from request`);
+      return res.status(400).json({
+        success: false,
+        error: 'Root directory is required'
+      });
+    }
+
+    const oldRootDirectory = config.server.rootDirectory;
+    console.log(`📁 API Server: Updating root directory from "${oldRootDirectory}" to "${rootDirectory}"`);
+    
+    // Validate root directory
+    if (rootDirectory === '/') {
+      console.log(`⚠️ API Server: Warning - Setting root directory to '/' will apply safety limits`);
+    }
+    
+    // Update the configuration
+    config.server.rootDirectory = rootDirectory;
+    
+    // Save the configuration to file
+    console.log(`💾 API Server: Saving configuration to ${CONFIG_FILE}`);
+    const saved = await saveConfig();
+    
+    if (saved) {
+      console.log(`✅ API Server: Root directory updated successfully to "${rootDirectory}"`);
+      console.log(`🔄 API Server: Refreshing file system cache...`);
+      
+      // Refresh file system cache with new root directory
+      const refreshed = await refreshFileSystemCache();
+      
+      console.log(`✅ API Server: File system cache refresh ${refreshed ? 'successful' : 'failed'}`);
+      
+      res.json({
+        success: true,
+        message: 'Root directory updated successfully',
+        data: { 
+          rootDirectory,
+          previousDirectory: oldRootDirectory,
+          configSaved: true,
+          cacheRefreshed: refreshed,
+          safetyLimitsApplied: rootDirectory === '/'
+        }
+      });
+    } else {
+      console.error(`❌ API Server: Failed to save configuration`);
+      res.status(500).json({
+        success: false,
+        error: 'Failed to save configuration'
+      });
+    }
+  } catch (error) {
+    console.error(`❌ API Server: Error updating root directory:`, error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to update root directory',
+      details: error.message
+    });
+  }
+});
+
+// Health check endpoint
+app.get('/api/v1/health', validateApiKey, (req, res) => {
+  const uptime = process.uptime();
+  const timestamp = new Date().toISOString();
+  
+  res.json({
+    success: true,
+    data: {
+      status: 'healthy',
+      timestamp,
+      uptime: Math.floor(uptime),
+      version: '1.0.0',
+      environment: config.server?.environment || 'development',
+      rootDirectory: config.server.rootDirectory,
+      fileSystemCache: {
+        lastUpdate: fileSystemCache.lastUpdate,
+        isValid: isCacheValid(),
+        totalFiles: fileSystemCache.totalFiles || 0,
+        maxDepth: fileSystemCache.maxDepth,
+        safetyLimitsActive: config.server.rootDirectory === '/'
+      }
+    }
+  });
+});
+
+// Get server information
+app.get('/api/v1/server-info', validateApiKey, (req, res) => {
+  res.json({
+    success: true,
+    data: {
+      name: config.server.name,
+      version: '1.0.0',
+      rootDirectory: config.server.rootDirectory,
+      capabilities: config.server.capabilities,
+      limits: {
+        maxFileSize: `${Math.round(config.filesystem.maxFileSize / 1024 / 1024)}MB`,
+        maxConcurrentTransfers: config.transfer.maxConcurrentTransfers,
+        maxScanDepth: config.filesystem.maxDepth,
+        safetyLimitsActive: config.server.rootDirectory === '/'
+      }
+    }
+  });
+});
+
+// Get file system structure
+app.get('/api/v1/filesystem', validateApiKey, async (req, res) => {
+  try {
+    // Check if cache is valid, refresh if needed
+    if (!isCacheValid()) {
+      const refreshed = await refreshFileSystemCache();
+      if (!refreshed) {
+        return res.status(500).json({
+          success: false,
+          error: 'Failed to scan file system'
+        });
+      }
+    }
+
+    res.json({
+      success: true,
+      data: {
+        files: fileSystemCache.data || [],
+        rootDirectory: config.server.rootDirectory,
+        lastUpdate: fileSystemCache.lastUpdate,
+        scanTime: fileSystemCache.scanTime,
+        totalFiles: fileSystemCache.totalFiles,
+        maxDepth: fileSystemCache.maxDepth,
+        safetyLimitsActive: config.server.rootDirectory === '/',
+        cached: true
+      }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error getting file system:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to get file system structure',
+      details: error.message
+    });
+  }
+});
+
+// Refresh file system cache manually
+app.post('/api/v1/filesystem/refresh', validateApiKey, async (req, res) => {
+  try {
+    const refreshed = await refreshFileSystemCache();
+    
+    if (refreshed) {
+      res.json({
+        success: true,
+        data: {
+          message: 'File system cache refreshed successfully',
+          lastUpdate: fileSystemCache.lastUpdate,
+          scanTime: fileSystemCache.scanTime,
+          totalFiles: fileSystemCache.totalFiles,
+          maxDepth: fileSystemCache.maxDepth,
+          safetyLimitsActive: config.server.rootDirectory === '/'
+        }
+      });
+    } else {
+      res.status(500).json({
+        success: false,
+        error: 'Failed to refresh file system cache'
+      });
+    }
+  } catch (error) {
+    console.error('❌ API Server: Error refreshing file system:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to refresh file system cache',
+      details: error.message
+    });
+  }
+});
+
+// Get specific directory contents
+app.get('/api/v1/filesystem/directory', validateApiKey, async (req, res) => {
+  const { path: dirPath = '/' } = req.query;
+  
+  try {
+    const fullPath = resolveFilePath(dirPath);
+    console.log(`📁 API Server: Getting directory contents for: ${dirPath} -> ${fullPath}`);
+    
+    const files = await scanDirectory(fullPath, 0, 2); // Limit depth for directory listing
+    
+    res.json({
+      success: true,
+      data: {
+        path: dirPath,
+        files,
+        timestamp: new Date().toISOString()
+      }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error getting directory contents:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to get directory contents',
+      details: error.message
+    });
+  }
+});
+
+// Read file content
+app.get('/api/v1/filesystem/file-content', validateApiKey, async (req, res) => {
+  try {
+    const { path: filePath } = req.query;
+    
+    if (!filePath) {
+      return res.status(400).json({
+        success: false,
+        error: 'File path is required'
+      });
+    }
+
+    const fullPath = resolveFilePath(filePath);
+    console.log(`📄 API Server: Reading file content from: ${filePath} -> ${fullPath}`);
+    
+    // Check if file exists and is a file
+    const stats = await getFileStats(fullPath);
+    if (!stats) {
+      return res.status(404).json({
+        success: false,
+        error: 'File not found'
+      });
+    }
+
+    if (!stats.isFile) {
+      return res.status(400).json({
+        success: false,
+        error: 'Path is not a file'
+      });
+    }
+
+    // Check file size limit (100MB default)
+    const maxFileSize = config.filesystem?.maxFileSize || 104857600;
+    if (stats.size > maxFileSize) {
+      return res.status(413).json({
+        success: false,
+        error: `File too large. Maximum size: ${Math.round(maxFileSize / 1024 / 1024)}MB`
+      });
+    }
+
+    const content = await fs.readFile(fullPath, 'utf8');
+    
+    console.log(`✅ API Server: File content read successfully, size: ${content.length} characters`);
+    
+    res.json({
+      success: true,
+      data: {
+        content,
+        path: filePath,
+        size: stats.size,
+        lastModified: stats.lastModified,
+        encoding: 'utf8'
+      }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error reading file content:', error);
+    
+    if (error.code === 'ENOENT') {
+      res.status(404).json({
+        success: false,
+        error: 'File not found'
+      });
+    } else if (error.code === 'EACCES') {
+      res.status(403).json({
+        success: false,
+        error: 'Permission denied'
+      });
+    } else if (error.code === 'EISDIR') {
+      res.status(400).json({
+        success: false,
+        error: 'Path is a directory, not a file'
+      });
+    } else {
+      res.status(500).json({
+        success: false,
+        error: 'Failed to read file content',
+        details: error.message
+      });
+    }
+  }
+});
+
+// Write file content
+app.post('/api/v1/filesystem/file-content', validateApiKey, async (req, res) => {
+  try {
+    const { path: filePath, content } = req.body;
+    
+    if (!filePath) {
+      return res.status(400).json({
+        success: false,
+        error: 'File path is required'
+      });
+    }
+
+    if (content === undefined || content === null) {
+      return res.status(400).json({
+        success: false,
+        error: 'File content is required'
+      });
+    }
+
+    const fullPath = resolveFilePath(filePath);
+    console.log(`📄 API Server: Writing file content to: ${filePath} -> ${fullPath}`);
+    console.log(`📄 API Server: Content length: ${content.length} characters`);
+    
+    // Ensure parent directory exists
+    const parentDir = path.dirname(fullPath);
+    await fs.mkdir(parentDir, { recursive: true });
+    
+    // Write file content
+    await fs.writeFile(fullPath, content, 'utf8');
+    
+    // Get file stats after writing
+    const stats = await getFileStats(fullPath);
+    
+    // Refresh file system cache
+    await refreshFileSystemCache();
+    
+    console.log(`✅ API Server: File content written successfully`);
+    
+    res.json({
+      success: true,
+      message: 'File content written successfully',
+      data: {
+        path: filePath,
+        size: stats?.size || content.length,
+        lastModified: stats?.lastModified || new Date(),
+        encoding: 'utf8'
+      }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error writing file content:', error);
+    
+    if (error.code === 'EACCES') {
+      res.status(403).json({
+        success: false,
+        error: 'Permission denied'
+      });
+    } else if (error.code === 'ENOSPC') {
+      res.status(507).json({
+        success: false,
+        error: 'Insufficient storage space'
+      });
+    } else {
+      res.status(500).json({
+        success: false,
+        error: 'Failed to write file content',
+        details: error.message
+      });
+    }
+  }
+});
+
+// Create folder
+app.post('/api/v1/filesystem/folder', validateApiKey, async (req, res) => {
+  try {
+    const { parentPath, name } = req.body;
+    
+    if (!parentPath || !name) {
+      return res.status(400).json({
+        success: false,
+        error: 'Parent path and name are required'
+      });
+    }
+
+    const fullParentPath = resolveFilePath(parentPath);
+    const newFolderPath = path.join(fullParentPath, name);
+    
+    console.log(`📁 API Server: Creating folder: ${parentPath}/${name} -> ${newFolderPath}`);
+    
+    await fs.mkdir(newFolderPath, { recursive: true });
+    await refreshFileSystemCache();
+    
+    console.log(`✅ API Server: Folder created successfully: ${newFolderPath}`);
+    
+    res.json({
+      success: true,
+      message: 'Folder created successfully',
+      data: { path: newFolderPath }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error creating folder:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to create folder',
+      details: error.message
+    });
+  }
+});
+
+// Create file
+app.post('/api/v1/filesystem/file', validateApiKey, async (req, res) => {
+  try {
+    const { parentPath, name } = req.body;
+    
+    if (!parentPath || !name) {
+      return res.status(400).json({
+        success: false,
+        error: 'Parent path and name are required'
+      });
+    }
+
+    const fullParentPath = resolveFilePath(parentPath);
+    const newFilePath = path.join(fullParentPath, name);
+    
+    console.log(`📄 API Server: Creating file: ${parentPath}/${name} -> ${newFilePath}`);
+    
+    await fs.writeFile(newFilePath, '', 'utf8');
+    await refreshFileSystemCache();
+    
+    console.log(`✅ API Server: File created successfully: ${newFilePath}`);
+    
+    res.json({
+      success: true,
+      message: 'File created successfully',
+      data: { path: newFilePath }
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error creating file:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to create file',
+      details: error.message
+    });
+  }
+});
+
+// Delete item - Updated to read path from query parameter
+app.delete('/api/v1/filesystem/item', validateApiKey, async (req, res) => {
+  try {
+    const itemPath = req.query.path;
+    
+    if (!itemPath) {
+      return res.status(400).json({
+        success: false,
+        error: 'Item path is required'
+      });
+    }
+
+    const fullPath = resolveFilePath(itemPath);
+    console.log(`🗑️ API Server: Attempting to delete item: ${itemPath} -> ${fullPath}`);
+    
+    const stats = await getFileStats(fullPath);
+    
+    if (!stats) {
+      console.log(`❌ API Server: Item not found: ${fullPath}`);
+      return res.status(404).json({
+        success: false,
+        error: 'Item not found'
+      });
+    }
+
+    if (stats.isDirectory) {
+      console.log(`📁 API Server: Deleting directory: ${fullPath}`);
+      await fs.rm(fullPath, { recursive: true, force: true });
+    } else {
+      console.log(`📄 API Server: Deleting file: ${fullPath}`);
+      await fs.unlink(fullPath);
+    }
+    
+    await refreshFileSystemCache();
+    
+    console.log(`✅ API Server: Item deleted successfully: ${fullPath}`);
+    
+    res.json({
+      success: true,
+      message: 'Item deleted successfully'
+    });
+  } catch (error) {
+    console.error('❌ API Server: Error deleting item:', error);
+    res.status(500).json({
+      success: false,
+      error: 'Failed to delete item',
+      details: error.message
+    });
+  }
+});
+
+// Get servers list (existing functionality)
+app.get('/api/v1/servers', validateApiKey, (req, res) => {
+  res.json({
+    success: true,
+    data: {
+      servers: mockServers,
+      total: mockServers.length
+    }
+  });
+});
+
+// Get specific server (existing functionality)
+app.get('/api/v1/servers/:serverId', validateApiKey, (req, res) => {
+  const { serverId } = req.params;
+  const server = mockServers.find(s => s.id === serverId);
+  
+  if (!server) {
+    return res.status(404).json({
+      success: false,
+      error: 'Server not found'
+    });
+  }
+
+  res.json({
+    success: true,
+    data: server
+  });
+});
+
+// Test server connection (existing functionality)
+app.post('/api/v1/servers/:serverId/test', validateApiKey, (req, res) => {
+  const { serverId } = req.params;
+  const server = mockServers.find(s => s.id === serverId);
+  
+  if (!server) {
+    return res.status(404).json({
+      success: false,
+      error: 'Server not found'
+    });
+  }
+
+  const isOnline = Math.random() > 0.3;
+  
+  setTimeout(() => {
+    res.json({
+      success: true,
+      data: {
+        serverId,
+        connected: isOnline,
+        responseTime: Math.floor(Math.random() * 200) + 50,
+        timestamp: new Date().toISOString()
+      }
+    });
+  }, 1000 + Math.random() * 2000);
+});
+
+// Error handling middleware
+app.use((error, req, res, next) => {
+  if (config.logging?.errors) {
+    console.error('❌ API Server Error:', error);
+  }
+  res.status(500).json({
+    success: false,
+    error: 'Internal server error',
+    details: process.env.NODE_ENV === 'development' ? error.message : undefined
+  });
+});
+
+// 404 handler
+app.use('*', (req, res) => {
+  res.status(404).json({
+    success: false,
+    error: 'Endpoint not found'
+  });
+});
+
+// Initialize file system cache on startup
+async function initializeServer() {
+  console.log(`🔧 API Server starting...`);
+  
+  // Load configuration first
+  await loadConfig();
+  
+  console.log(`📁 API Server: Root directory: ${config.server.rootDirectory}`);
+  console.log(`🔍 API Server: Max scan depth: ${config.filesystem.maxDepth}`);
+  
+  if (config.server.rootDirectory === '/') {
+    console.log(`⚠️ API Server: WARNING - Root directory is '/', safety limits will be applied`);
+  }
+  
+  // Start config file watcher
+  await watchConfigFile();
+  
+  // Initial file system scan
+  await refreshFileSystemCache();
+  
+  // Set up periodic cache refresh
+  const refreshInterval = config.filesystem?.cacheSettings?.refreshInterval || 300000; // 5 minutes default
+  setInterval(async () => {
+    console.log('🔄 API Server: Performing scheduled file system cache refresh...');
+    await refreshFileSystemCache();
+  }, refreshInterval);
+}
+
+// Start server
+app.listen(PORT, async () => {
+  await initializeServer();
+  
+  console.log(`🔧 API Server running on port ${PORT}`);
+  console.log(`🔑 API Server: API Key: ${API_KEY ? 'Configured' : 'Missing'}`);
+  console.log(`🌍 API Server: Environment: ${config.server?.environment || 'development'}`);
+  console.log(`👁️ API Server: Config file watching: Enabled`);
+  console.log(`📋 API Server: Available endpoints:`);
+  console.log(`   GET  /api/v1/config`);
+  console.log(`   POST /api/v1/config`);
+  console.log(`   POST /api/v1/config/root-directory`);
+  console.log(`   GET  /api/v1/health`);
+  console.log(`   GET  /api/v1/server-info`);
+  console.log(`   GET  /api/v1/filesystem`);
+  console.log(`   POST /api/v1/filesystem/refresh`);
+  console.log(`   GET  /api/v1/filesystem/directory`);
+  console.log(`   GET  /api/v1/filesystem/file-content`);
+  console.log(`   POST /api/v1/filesystem/file-content`);
+  console.log(`   POST /api/v1/filesystem/folder`);
+  console.log(`   POST /api/v1/filesystem/file`);
+  console.log(`   DELETE /api/v1/filesystem/item`);
+  console.log(`   GET  /api/v1/servers`);
+  console.log(`   GET  /api/v1/servers/:id`);
+  console.log(`   POST /api/v1/servers/:id/test`);
+});
\ No newline at end of file