I'm trying to get some json from this url : http://api.conceptnet.io/query?rel=/r/UsedFor&limit=3

I have a button that calls the function "jsonplz()" which is supposed to give me an alert with the fetched json.

My javascript looks something like this :

<script src="http://code.jquery.com/jquery-3.3.1.min.js">
</script>
<script>
function jsonplz(){
        $.getJSON("http://api.conceptnet.io/query?rel=/r/UsedFor&limit=3?callback=?",function(json){
        console.log(json);
        });
}
</script>

As you can see, I'm trying to fetch is as jsonp, hence why I added " ?callback=? " at the end of the url, otherwise if I was trying to get it as json, my browser would have blocked me.

Here's the problem : it still doesn't work. I get this error on the firefox console when I call jsonplz() :

Warning : The script from “https://api.conceptnet.io/query?rel=/r/UsedFor&limit=3?callback=jQuery331030366838930478535_1646253265514&_=1646253265515” was loaded even though its MIME type (“application/json”) is not a valid JavaScript MIME type.

Error : Uncaught SyntaxError: unexpected token: ':'

Any solution to either solve this error or any other way to retrieve json from an external url without downloading additional third party software is appreciated