How to Scan a Website for Malicious Content and Threats with JavaScript

2 min readMay 19, 2022


Some unlucky people have learned the hard way that a URL can contain a whole host of threats (with phishing attempts among the most painful of them all). If you’re looking for protection against bad URLs, thankfully we have an API for that.

It’s easy to scan URLs for threats with our Virus Scanning API, and you can structure your API call with the JavaScript code snippets we’ve provided below for your convenience. The API response will let you know if the URL was clean or infected, and if it turns out to be the later, you’ll get key information regarding the nature of the threat within the URL.

Let’s kick things off by installing the jQuery library for this API. Run the below command:

bower install jquery

After that, let’s include our code to make the API call. You’ll need to satisfy two parameters here — 1)include the URL you want to scan, and 2)include your Cloudmersive API key, which is attainable by registering a free account on our website (Home — Cloudmersive APIs).

var settings = {
"url": "",
"method": "POST",
"timeout": 0,
"headers": {
"Content-Type": "application/x-www-form-urlencoded",
"data": {
"Url": "<string>"
$.ajax(settings).done(function (response) {




There’s an API for that. Cloudmersive is a leader in Highly Scalable Cloud APIs.