Ember.js consuming REST Services

I have been working on a web app using .NET web forms. Now I'm trying to move to a Web API and a client side application. I'm trying to use Ember.js right now. I'm starting to get confused with Ember 2.0, Ember-Data and stuff.

My problem right now is that I'm trying to consume some of the REST services in order to show a list of things in my Ember app. Is it mandatory for me to use Ember-Data? If not, how can I consume the services to create, read, update and delete items (I mean, am I able to use only ajax or something)?

The Web API was built in order to be usable for many technologies. I need to build an specific URL for each request (even a simple GET has some mandatory parameters). That's why ember-data is not working well for me, at least not what I have learnt about it. Because this.store.find won't allow me to build the URL I need.

Greetings.