diff --git a/New_APIs/Expense_Tracker_API/.gitignore b/New_APIs/Expense_Tracker_API/.gitignore
new file mode 100644
index 00000000..7af7f047
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/.gitignore
@@ -0,0 +1,2 @@
+/node_modules
+.env
\ No newline at end of file
diff --git a/New_APIs/Expense_Tracker_API/README.md b/New_APIs/Expense_Tracker_API/README.md
new file mode 100644
index 00000000..7c841393
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/README.md
@@ -0,0 +1,79 @@
+# Expense Tracker API
+
+## Description
+This API allows users to manage their expenses by providing functionalities to add, update, delete, and retrieve expenses. Users can also register and log in to secure their data. The API supports filtering expenses by various criteria, including month and year.
+
+## Features
+1. User registration and login to secure expense data.
+2. Add new expenses.
+3. Update existing expenses.
+4. Delete expenses.
+5. Retrieve expenses by various criteria (e.g., month, year, category).
+6. Retrieve expenses for a specific month and year.
+
+## Requirements
+- Node.js
+- MongoDB
+- Postman
+
+## Installation
+1. Clone the Repository:
+
+```bash
+git clone https://github.com/dishamodi0910/APIVerse.git
+cd New_APIs
+cd Expense_Tracker_API
+```
+
+2.Install Dependencies:
+
+```bash
+npm install
+```
+4. Start the Server:
+
+```bash
+node server.js
+```
+
+## API Endpoints:
+
+1. User Registration
+
+```http
+POST /api/auth/register
+```
+
+2.User Login
+
+```http
+POST /api/auth/login
+```
+
+3. Add Expenses
+
+```http
+POST /api/expenses
+```
+
+4. Update Expenses
+
+```http
+PUT /api/expenses/:id
+```
+
+5. Delete Expenses
+
+```http
+GET /api/expenses
+```
+
+6. Get Expenses by Month and Year
+
+```http
+GET /api/expenses/month/:month/year/:year
+```
+
+## Notes
+- Ensure the server is running at 5000.
+- Use Postman or similar tools to test and interact with the API endpoints.
diff --git a/New_APIs/Expense_Tracker_API/config/db.js b/New_APIs/Expense_Tracker_API/config/db.js
new file mode 100644
index 00000000..90eb2484
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/config/db.js
@@ -0,0 +1,25 @@
+const fs = require('fs');
+const path = require('path');
+
+const dbPath = path.resolve(__dirname, '../database.json');
+
+// Initialize the database file if it does not exist
+const initializeDB = () => {
+  if (!fs.existsSync(dbPath)) {
+    const initialData = { users: [], expenses: [] };
+    fs.writeFileSync(dbPath, JSON.stringify(initialData, null, 2));
+  }
+};
+
+initializeDB();
+
+const readData = () => {
+  const data = fs.readFileSync(dbPath);
+  return JSON.parse(data);
+};
+
+const writeData = (data) => {
+  fs.writeFileSync(dbPath, JSON.stringify(data, null, 2));
+};
+
+module.exports = { readData, writeData };
diff --git a/New_APIs/Expense_Tracker_API/database.json b/New_APIs/Expense_Tracker_API/database.json
new file mode 100644
index 00000000..0daaa223
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/database.json
@@ -0,0 +1,66 @@
+{
+  "users": [
+    {
+      "id": 1721424141648,
+      "name": "Khushi Kalra",
+      "email": "kalra@gmail.com",
+      "password": "$2a$10$hfW1tOhVl4JK77JY0uJmSeexuEbWcXU3BFEl0LJYRXR9Z3dIKMBUm"
+    },
+    {
+      "id": 1721454350397,
+      "name": "XYZ",
+      "email": "xyz@gmail.com",
+      "password": "$2a$10$Rn4gwRZyHjMRdZka23KSXuEP2GAJkGbmUZzH.zhExyiNO3yZOrDmq"
+    }
+  ],
+  "expenses": [
+    {
+      "id": 1721452253157,
+      "userId": 1721424141648,
+      "amount": 100,
+      "description": "Office Supplies",
+      "category": "Work",
+      "date": "2024-07-20T05:10:53.157Z"
+    },
+    {
+      "id": 1721452284744,
+      "userId": 1721424141648,
+      "amount": 50,
+      "description": "Markers",
+      "category": "Work",
+      "date": "2024-07-20T05:11:24.744Z"
+    },
+    {
+      "id": 1721452309611,
+      "userId": 1721424141648,
+      "amount": 250,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-06-20T05:11:49.611Z"
+    },
+    {
+      "id": 1721454204902,
+      "userId": 1721424141648,
+      "amount": 50,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:43:24.902Z"
+    },
+    {
+      "id": 1721454410029,
+      "userId": 1721454350397,
+      "amount": 150,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:46:50.029Z"
+    },
+    {
+      "id": 1721454479574,
+      "userId": 1721454350397,
+      "amount": 50,
+      "description": "Outing",
+      "category": "Food",
+      "date": "2024-07-20T05:47:59.574Z"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/New_APIs/Expense_Tracker_API/models/Expense.js b/New_APIs/Expense_Tracker_API/models/Expense.js
new file mode 100644
index 00000000..4be7401b
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/models/Expense.js
@@ -0,0 +1,74 @@
+const { readData, writeData } = require('../config/db');
+
+const createExpense = (userId, amount, description, category) => {
+  const data = readData();
+  const newExpense = { id: Date.now(), userId, amount, description, category, date: new Date() };
+  data.expenses.push(newExpense);
+  writeData(data);
+  return newExpense;
+};
+
+const getExpensesByUserId = (userId) => {
+  const data = readData();
+  return data.expenses.filter(expense => expense.userId === userId);
+};
+
+const getExpensesByCategory = (userId, category) => {
+  const data = readData();
+  return data.expenses.filter(expense => expense.userId === userId && expense.category === category);
+};
+
+const getTotalAmountByCategory = (userId, category) => {
+  const expenses = getExpensesByCategory(userId, category);
+  return expenses.reduce((total, expense) => total + expense.amount, 0);
+};
+
+const deleteExpenseById = (id) => {
+  const data = readData();
+  data.expenses = data.expenses.filter(expense => expense.id !== id);
+  writeData(data);
+};
+
+const getMonthlyExpenses = (userId) => {
+  const data = readData();
+
+  const expensesByMonth = data.expenses
+    .filter(expense => expense.userId === userId)
+    .reduce((acc, expense) => {
+      const expenseDate = new Date(expense.date);
+      const month = expenseDate.getMonth() + 1; // JavaScript months are 0-based
+      const year = expenseDate.getFullYear();
+      const key = `${year}-${month.toString().padStart(2, '0')}`;
+
+      if (!acc[key]) {
+        acc[key] = { total: 0, expenses: [] };
+      }
+      acc[key].total += expense.amount;
+      acc[key].expenses.push(expense);
+
+      return acc;
+    }, {});
+
+  return expensesByMonth;
+};
+
+const getExpensesByMonthYear = (userId, year, month) => {
+  const data = readData();
+  const filteredExpenses = data.expenses.filter(expense => {
+    const expenseDate = new Date(expense.date);
+    return expense.userId === userId && expenseDate.getFullYear() === year && (expenseDate.getMonth() + 1) === month;
+  });
+
+  const totalAmount = filteredExpenses.reduce((total, expense) => total + expense.amount, 0);
+  return { totalAmount, expenses: filteredExpenses };
+};
+
+module.exports = {
+  createExpense,
+  getExpensesByUserId,
+  getExpensesByCategory,
+  getTotalAmountByCategory,
+  deleteExpenseById,
+  getMonthlyExpenses,
+  getExpensesByMonthYear
+};
diff --git a/New_APIs/Expense_Tracker_API/models/User.js b/New_APIs/Expense_Tracker_API/models/User.js
new file mode 100644
index 00000000..b93b9c7e
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/models/User.js
@@ -0,0 +1,16 @@
+const { readData, writeData } = require('../config/db');
+
+const createUser = (name, email, password) => {
+  const data = readData();
+  const newUser = { id: Date.now(), name, email, password };
+  data.users.push(newUser);
+  writeData(data);
+  return newUser;
+};
+
+const getUserByEmail = (email) => {
+  const data = readData();
+  return data.users.find(user => user.email === email);
+};
+
+module.exports = { createUser, getUserByEmail };
diff --git a/New_APIs/Expense_Tracker_API/package-lock.json b/New_APIs/Expense_Tracker_API/package-lock.json
new file mode 100644
index 00000000..665087d4
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/package-lock.json
@@ -0,0 +1,816 @@
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+  "name": "expense_tracker_api",
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diff --git a/New_APIs/Expense_Tracker_API/package.json b/New_APIs/Expense_Tracker_API/package.json
new file mode 100644
index 00000000..47a16414
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/package.json
@@ -0,0 +1,8 @@
+{
+  "dependencies": {
+    "bcryptjs": "^2.4.3",
+    "dotenv": "^16.4.5",
+    "express": "^4.19.2",
+    "jsonwebtoken": "^9.0.2"
+  }
+}
diff --git a/New_APIs/Expense_Tracker_API/routes/auth.js b/New_APIs/Expense_Tracker_API/routes/auth.js
new file mode 100644
index 00000000..f4918183
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/routes/auth.js
@@ -0,0 +1,42 @@
+const express = require('express');
+const bcrypt = require('bcryptjs');
+const jwt = require('jsonwebtoken');
+const { createUser, getUserByEmail } = require('../models/User');
+require('dotenv').config();
+
+const router = express.Router();
+
+// Route to register a new user
+router.post('/register', (req, res) => {
+  const { name, email, password } = req.body;
+
+  if (getUserByEmail(email)) {
+    return res.status(400).json({ msg: 'User already exists' });
+  }
+
+  bcrypt.hash(password, 10, (err, hashedPassword) => {
+    if (err) return res.status(500).json({ msg: 'Server error' });
+
+    const user = createUser(name, email, hashedPassword);
+    const token = jwt.sign({ id: user.id }, process.env.JWT_SECRET, { expiresIn: '5h' });
+    res.json({ token });
+  });
+});
+
+// Route to login a user
+router.post('/login', (req, res) => {
+  const { email, password } = req.body;
+
+  const user = getUserByEmail(email);
+  if (!user) return res.status(400).json({ msg: 'Invalid credentials' });
+
+  bcrypt.compare(password, user.password, (err, isMatch) => {
+    if (err) return res.status(500).json({ msg: 'Server error' });
+    if (!isMatch) return res.status(400).json({ msg: 'Invalid credentials' });
+
+    const token = jwt.sign({ id: user.id }, process.env.JWT_SECRET, { expiresIn: '5h' });
+    res.json({ token });
+  });
+});
+
+module.exports = router;
diff --git a/New_APIs/Expense_Tracker_API/routes/expenses.js b/New_APIs/Expense_Tracker_API/routes/expenses.js
new file mode 100644
index 00000000..d2d5ce6b
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/routes/expenses.js
@@ -0,0 +1,68 @@
+const express = require('express');
+const jwt = require('jsonwebtoken');
+const {
+  createExpense,
+  getExpensesByUserId,
+  getExpensesByCategory,
+  getTotalAmountByCategory,
+  deleteExpenseById,
+  getMonthlyExpenses,
+  getExpensesByMonthYear
+} = require('../models/Expense');
+require('dotenv').config();
+
+const router = express.Router();
+
+// Middleware to authenticate token
+const authenticate = (req, res, next) => {
+  const token = req.header('x-auth-token');
+  if (!token) return res.status(401).json({ msg: 'No token, authorization denied' });
+
+  jwt.verify(token, process.env.JWT_SECRET, (err, decoded) => {
+    if (err) return res.status(401).json({ msg: 'Token is not valid' });
+    req.userId = decoded.id;
+    next();
+  });
+};
+
+// Route to create a new expense
+router.post('/', authenticate, (req, res) => {
+  const { amount, description, category } = req.body;
+
+  const expense = createExpense(req.userId, amount, description, category);
+  res.json(expense);
+});
+
+// Route to get expenses by user ID
+router.get('/', authenticate, (req, res) => {
+  const expenses = getExpensesByUserId(req.userId);
+  res.json(expenses);
+});
+
+// Route to get expenses by category
+router.get('/category/:category', authenticate, (req, res) => {
+  const expenses = getExpensesByCategory(req.userId, req.params.category);
+  const totalAmount = getTotalAmountByCategory(req.userId, req.params.category);
+  res.json({ totalAmount, expenses });
+});
+
+// Route to get monthly expenses
+router.get('/monthly', authenticate, (req, res) => {
+  const monthlyExpenses = getMonthlyExpenses(req.userId);
+  res.json(monthlyExpenses);
+});
+
+// Route to get expenses by month and year
+router.get('/month/:year/:month', authenticate, (req, res) => {
+  const { year, month } = req.params;
+  const result = getExpensesByMonthYear(req.userId, parseInt(year, 10), parseInt(month, 10));
+  res.json(result);
+});
+
+// Route to delete an expense by ID
+router.delete('/:id', authenticate, (req, res) => {
+  deleteExpenseById(parseInt(req.params.id, 10));
+  res.json({ msg: 'Expense removed' });
+});
+
+module.exports = router;
diff --git a/New_APIs/Expense_Tracker_API/server.js b/New_APIs/Expense_Tracker_API/server.js
new file mode 100644
index 00000000..ccbcad76
--- /dev/null
+++ b/New_APIs/Expense_Tracker_API/server.js
@@ -0,0 +1,14 @@
+const express = require('express');
+require('dotenv').config();
+
+const app = express();
+
+// Middleware
+app.use(express.json({ extended: false }));
+
+// Routes
+app.use('/api/auth', require('./routes/auth'));
+app.use('/api/expenses', require('./routes/expenses'));
+
+const PORT = process.env.PORT || 5000;
+app.listen(PORT, () => console.log(`Server running on port ${PORT}`));