Post a variable to json format in Ember.js

I apologize if this question seems basic as I am new to both stackoverflow and javascript in general.

My goal here is to store the user's dropdown menu selection as well as some other user inputs into variables, then I want to post the json file that contains the variables into a specific route where my serve-side javascript can read from. I have the variable part and user selection part covered, however, I am having trouble posting the variables to the specified route.

So in my app.js file in my ember framework, I tried the below code to test out if I can post {12345} to address:port/api/iwantmyjsonhere/ but when I run it and go to that specific page (address:port/api/iwantmyjsonhere/), it says cannot GET.

$(document).ready(function() {
       $.ajax({ url : "/api/iwantmyjsonhere/",
       type: 'POST',
       dataType : "json",
       data: "12345"
      });

    });

I understand that this question is lower level, so if you guys are too busy to answer, point me to any resources that might help me would be greatly appreciated too! Thanks in advance!