Summary  
This chapter explains how to implement an HTTP POST endpoint that receives JSON data in the request body and adds new records to a server-side collection.

General domain of usage  
User management in web applications



POST endpoints are used to create new data.

The client sends data in the request body, and the server processes it and stores it.

```javascript id="c2k8qm"
let users = [
  { id: 1, name: 'John' }
];

app.post('/users', (req, res) => {
  const newUser = req.body;

  users.push(newUser);

  res.json(newUser);
});
```

The server receives the data through `req.body` and adds it to the collection.

Example request body:

```json id="n8f4za"
{ "id": 2, "name": "Anna" }
```

After sending this request, the new user is added.

POST endpoints are used whenever you need to create new records in your application.


Learn how to build backend servers and APIs using Express.js. Create routes, handle requests and responses, and work with real data flows. Gain practical skills needed to start building real backend applications.

Creating Data with POST for API