Simple REST API for managing users. Create, read, update, and delete user data.

git clone https://github.com/niladri-1/REST-API.git
cd REST-API
npm install
npm start

Server runs at http://localhost:5000

What it does: Returns a list of all users

URL: https://curdapi-ycmy.onrender.com/users

How to test:

• Browser: Just paste the URL above in your address bar
• Postman: Create a GET request with the URL above
• JavaScript:

  fetch('https://curdapi-ycmy.onrender.com/users')
    .then(response => response.json())
    .then(data => console.log(data));

Response example:

[
  {
    "firstName": "John",
    "lastName": "Doe",
    "age": 25,
    "id": "abc-123-def"
  }
]

What it does: Adds a new user to the database

URL: https://curdapi-ycmy.onrender.com/users

How to do it:

Using Postman:

1. Set method to POST
2. URL: https://curdapi-ycmy.onrender.com/users
3. Go to Body → raw → JSON
4. Paste this:

   {
     "firstName": "Jane",
     "lastName": "Smith",
     "age": 28
   }

5. Click Send

Using JavaScript:

fetch('https://curdapi-ycmy.onrender.com/users', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    firstName: 'Jane',
    lastName: 'Smith',
    age: 28
  })
})

Response: "Jane is added"

What it does: Gets information about one specific user

URL: https://curdapi-ycmy.onrender.com/users/{user-id}

Replace {user-id} with the actual ID from when you created or fetched users

Example: https://curdapi-ycmy.onrender.com/users/abc-123-def

How to test:

• Browser: Paste the URL with a real user ID
• Postman: GET request with the URL above

What it does: Changes some information about an existing user

URL: https://curdapi-ycmy.onrender.com/users/{user-id}

How to do it:

Using Postman:

1. Set method to PATCH
2. URL: https://curdapi-ycmy.onrender.com/users/{user-id} (use real ID)
3. Go to Body → raw → JSON
4. Send only the fields you want to change:

   {
     "age": 29
   }

Using JavaScript:

fetch('https://curdapi-ycmy.onrender.com/users/abc-123-def', {
  method: 'PATCH',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    age: 29
  })
})

Response: "abc-123-def has been updated!"

What it does: Permanently deletes a user from the database

URL: https://curdapi-ycmy.onrender.com/users/{user-id}

How to do it:

Using Postman:

1. Set method to DELETE
2. URL: https://curdapi-ycmy.onrender.com/users/{user-id} (use real ID)
3. Click Send

Using JavaScript:

fetch('https://curdapi-ycmy.onrender.com/users/abc-123-def', {
  method: 'DELETE'
})

Response: "User Id: abc-123-def deleted from DB!"

⚠️ No Database: Data is stored in memory only. When server restarts, all users are lost.

🔑 User ID: Every user gets a unique ID automatically (UUID format)

Node.js • Express.js • UUID

ISC