An example for using $.postJson with an ASP.NET AntiForgeryToken

using-jQuery.postJson.js

function myFunction () {
    //Grab antiForgeryToken. (Don't forget to add @Html.AntiForgeryToken() to your view or this will be empty)
    var antiForgeryToken = $("input[name=__RequestVerificationToken]").val();
    
    //Prepare parameters
    var params = {
      FirstName: "Joshua",
      LastName: "Harms"
    };
    
    //Send parameters as JSON, including the AntiForgeryToken to be validated by our ASP.NET backend
    $.postJson("/somepath/dosomething", params, function success (data) { console.log("Success!"); }, antiForgeryToken);
}