So i have something that is sending a jquery ajax POST, GET, PUT with the data as json etc to a web service on a different domain. I have heard about JSONP to some effect to prevent sql injection. What exactly is jsonp and how exactly would i use it. I have other cases where i post using json to other apis using curl commands. Would i need to use it in this case as well or is it only if its coming from the browser. Everything is going across https.