To make an HTTP request in Magento 2, you can use the following steps:

First, you need to inject the HTTP client class into your class using dependency injection. You can do this by adding the following line of code in your class constructor:

public function __construct(
    \Magento\Framework\HTTP\Client\Curl $curl
) {
    $this->curl = $curl;

Now you can use the $this->curl object to make an HTTP request. You can set the request method, headers, and body using the following methods:

// Set the request method
$this->curl->setOption(CURLOPT_CUSTOMREQUEST, 'POST');

// Set the request headers
$this->curl->setHeaders(['Content-Type: application/json']);

// Set the request body

Finally, you can send the request and get the response using the following code:

// Send the request

// Get the response status code
$statusCode = $this->curl->getStatus();

// Get the response body
$responseBody = $this->curl->getBody();

That’s it! You have now made an HTTP request in Magento 2 using the Curl client class.