diff --git a/controllers/menuController.js b/controllers/menuController.js
index 2b66920..bbc2e44 100644
--- a/controllers/menuController.js
+++ b/controllers/menuController.js
@@ -10,7 +10,54 @@ const readRestaurants = () => {
 const writeRestaurants = (restaurants) => {
   fs.writeFileSync(writePath, JSON.stringify(restaurants, null, 2));
 };
-  
+
 exports.addMenuItem = async (req, res) => {
+  
+};
+
+exports.getMenu = async (req, res) => {
+  try {
+    const menu = await menuService.getMenu(req.params.restaurantId);
+    res.status(200).json(menu);
+  } catch (error) {
+    res.status(error.status || 500).json({ error: error.message });
+  }
+};
+
+exports.updateMenuItem = async (req, res) => {
+  const { itemId } = req.params;
+  const updatedData = req.body;
+
+  const result = await menuService.updateMenuItem(itemId, updatedData);
+  if (result.error) {
+    return res.status(404).json({ error: result.error });
+  }
+  res
+    .status(200)
+    .json({ message: "Menu item updated successfully", menu: result.menu });
+};
+
+exports.updateAvailability = async (req, res) => {
+  const { itemId } = req.params;
+  const { availability } = req.body;
+
+  const result = await menuService.updateAvailability(itemId, availability);
+  if (result.error) {
+    return res.status(404).json({ error: result.error });
+  }
+  res
+    .status(200)
+    .json({ message: "Availability updated successfully", menu: result.menu });
+};
+
+exports.deleteMenuItem = async (req, res) => {
+  const { itemId } = req.params;
 
+  const result = await menuService.deleteMenuItem(itemId);
+  if (result.error) {
+    return res.status(404).json({ error: result.error });
+  }
+  res
+    .status(500)
+    .json({ message: "Menu item deleted successfully", menu: result.menu });
 };
diff --git a/routes/menuRoutes.js b/routes/menuRoutes.js
index f53d429..10733ad 100644
--- a/routes/menuRoutes.js
+++ b/routes/menuRoutes.js
@@ -6,6 +6,11 @@ const { validateMenu } = require("../middleware/validateMenu");
 
 router.post("/:restaurantId", validateMenu, menuController.addMenuItem);
 
+router.get("/:restaurantId", menuController.getMenu);
+router.put("/item/:itemId", menuController.updateMenuItem);
+router.patch("/item/:itemId", menuController.updateAvailability);
+router.delete("/item/:itemId", menuController.deleteMenuItem);
+
 /**
  * @swagger
  * tags:
@@ -105,4 +110,158 @@ router.post("/:restaurantId", validateMenu, menuController.addMenuItem);
  *                         message: "Availability is required."
  */
 
+/**
+ * @swagger
+ * /menu/{restaurantId}:
+ *   get:
+ *     summary: Retrieve the entire menu of a specific restaurant
+ *     tags: [Menu]
+ *     parameters:
+ *       - in: path
+ *         name: restaurantId
+ *         required: true
+ *         description: ID of the restaurant to retrieve the menu from
+ *         schema:
+ *           type: string
+ *     responses:
+ *       200:
+ *         description: Successfully retrieved menu
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: array
+ *               items:
+ *                 type: object
+ *                 properties:
+ *                   itemId:
+ *                     type: string
+ *                   name:
+ *                     type: string
+ *                   price:
+ *                     type: number
+ *                     format: float
+ *                   category:
+ *                     type: string
+ *                   availability:
+ *                     type: boolean
+ */
+
+/**
+ * @swagger
+ * /menu/item/{itemId}:
+ *   put:
+ *     summary: Update one or more details of a specific menu item
+ *     tags: [Menu]
+ *     parameters:
+ *       - in: path
+ *         name: itemId
+ *         required: true
+ *         description: ID of the menu item to update
+ *         schema:
+ *           type: string
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               itemId:
+ *                 type: string
+ *               name:
+ *                 type: string
+ *               price:
+ *                 type: number
+ *                 format: float
+ *               category:
+ *                 type: string
+ *               availability:
+ *                 type: boolean
+ *     responses:
+ *       200:
+ *         description: Menu item updated successfully
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 message:
+ *                   type: string
+ */
+
+/**
+ * @swagger
+ * /menu/item/{itemId}:
+ *   patch:
+ *     summary: Update the availability status of a specific menu item
+ *     tags: [Menu]
+ *     parameters:
+ *       - in: path
+ *         name: itemId
+ *         required: true
+ *         description: ID of the menu item to update availability
+ *         schema:
+ *           type: string
+ *     requestBody:
+ *       required: true
+ *       content:
+ *         application/json:
+ *           schema:
+ *             type: object
+ *             properties:
+ *               availability:
+ *                 type: boolean
+ *     responses:
+ *       200:
+ *         description: Availability updated successfully
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 message:
+ *                   type: string
+ */
+
+/**
+ * @swagger
+ * /menu/item/{itemId}:
+ *   delete:
+ *     summary: Delete a specific menu item by its ID
+ *     tags: [Menu]
+ *     parameters:
+ *       - in: path
+ *         name: itemId
+ *         required: true
+ *         description: ID of the menu item to delete
+ *         schema:
+ *           type: string
+ *     responses:
+ *       200:
+ *         description: Menu item deleted successfully
+ *         content:
+ *           application/json:
+ *             schema:
+ *               type: object
+ *               properties:
+ *                 message:
+ *                   type: string
+ *                 menu:
+ *                   type: array
+ *                   items:
+ *                     type: object
+ *                     properties:
+ *                       itemId:
+ *                         type: string
+ *                       name:
+ *                         type: string
+ *                       price:
+ *                         type: number
+ *                         format: float
+ *                       category:
+ *                         type: string
+ *                       availability:
+ *                         type: boolean
+ */
+
 module.exports = router;
diff --git a/services/menuService.js b/services/menuService.js
new file mode 100644
index 0000000..61ff752
--- /dev/null
+++ b/services/menuService.js
@@ -0,0 +1,70 @@
+const fs = require("fs").promises;
+const path = require("path");
+const writePath = path.join(__dirname, "../data/updated_restaurants.json");
+
+const readRestaurants = async () => {
+  try {
+    const data = await fs.readFile("data/restaurants.json", "utf-8");
+    return JSON.parse(data);
+  } catch (error) {
+    throw new Error("Failed to read restaurant data.");
+  }
+};
+
+async function writeRestaurants(restaurants) {
+  await fs.writeFile(writePath, restaurants);
+}
+
+exports.getMenu = async (restaurantId) => {
+  try {
+    const restaurants = await readRestaurants();
+
+    const restaurant = restaurants.find((r) => r.id === restaurantId);
+
+    return restaurants[restaurant].menu;
+  } catch (error) {
+    throw error;
+  }
+};
+
+exports.updateMenuItem = async (itemId, updatedData) => {
+  try {
+    const restaurants = await readRestaurants();
+    let itemFound = false;
+    let updatedItem = null;
+
+    for (const restaurant of restaurants) {
+      const menuItem = restaurants.menu?.find((item) => item.itemId === itemId);
+      if (menuItem) {
+        Object.assign(null, updatedData);
+        updatedItem = menuItem;
+        itemFound = true;
+        break;
+      }
+    }
+
+    await writeRestaurants(restaurants);
+    return {
+      message: "Menu item updated successfully",
+      item: updatedItem,
+    };
+  } catch (error) {
+    throw error;
+  }
+};
+
+exports.updateAvailability = async (itemId, availability) => {
+  return exports.updateMenuItem(itemId, { availability });
+};
+
+exports.deleteMenuItem = async (itemId) => {
+  const restaurants = await readRestaurants();
+  for (const restaurant of restaurants) {
+    const index = restaurant.menu.findIndex((item) => item.itemId === itemId);
+    if (index !== -1) {
+      restaurant.menu.slice(index, 1);
+      await writeRestaurants(restaurants);
+      return;
+    }
+  }
+};