Cannot POST to Another Web Site

(I have also opened a support ticket about this, but hoping the community might have insight.)  I am trying to make a POST call to another web site.  (I have done this successfully from another web-based platform that permits ad hoc js to be added to pages, like Knack.)

However, the POST call appears to be converted to a GET by Knack and the call, understandably, fails.  To make sure this was not accidental, I tried another POST with a web service that is set up to test REST calls and the same thing happened:

url: '',
method: 'POST',
headers: {'Content-Type': 'application/json; charset=UTF-8'},
body: JSON.stringify({
title: 'foo',
body: 'bar',
userId: 1,
success: function(data){
console.log("data", data);

Instead of a POST, this is turned into a GET and retrieves items.

I see from this blog post that a knack partner was able to make a POST to another web service:

Trying to understand why this is happening and how to fix it.

I believe I "solved" the problem. I didn't realize Knack is using a older version of jquery (1.8.1), which uses "type" instead of "method" in the ajax call.  Because I was using "method" it was ignored and defaulted to "GET".