How to configure REST server to create new node from URL parameters?
In order to create the node you must use the POST HTTP request so you can't do something like domain/endpoint?title=test&amp;url=http%253A%252F%252Fwww.example.com(it's GET HTTP request). You can do the following to solve your problems:


First you need to make the Services 3.0 work with Firefox Poster tool. You can go Testing with REST Server for checking all the basic function in case you forgot to set the permissions or forgot to enable resources.
After you find out how to communicate with Services 3.0. You can use drupal_http_request to build your own POST/GET HTTP request. An example will be here Making authenticated requests to REST Server.