This bit of JavaScript can be used to repeatedly make an HTTP request to an endpoint.

bombard-with-http-request.js

/**
 * This script could be used to test whether an endpoint could handle an overload
 * of HTTP requests.
 */
{
    const URL = "https://example.com";
    const MILLISEC_WAIT_PER_REQUEST = 100;
    
    function bombardWithHttpRequest() {
        fetch(URL)
            .then(function(response) {
                return response.json();
            });
        return delay(MILLISEC_WAIT_PER_REQUEST)
            .then(ddos);
    }

    function delay(ms) {
        return new Promise((res, rej) => {
            setTimeout(res, ms);
        });
    }
    
    // bombardWithHttpRequest();
}