Can we call the API via jQuery.ajax?

Hi sorry if this has been covered elsewhere. If so, please point me in the right direction.

I'm using replicate to duplicate nodes from a view listing of specific documents and in doing so, I assign the user in focus as the author of the duplicate and put in a specific title, etc... jQuery.ajax will be the most intiutive method for our purpose but I'm not sure how I can access the API that way. Is this possible? If not, I'll make it so if I can get some direction.

My code is as follows:

  /*
   * Use jQuery.ajax to push values for:
   * 	$uid 
   *	$user_name
   *	$node_id 
   *	$organization_id
   */

  $entity = array_shift(entity_load('node', array($node_id)));

  $cloned_entity = replicate_clone_entity('node', $entity);

  $source_document_title = $cloned_entity->title;
  $target_title = $source_document_title . " - " . $user_name;

  $cloned_entity->title = $target_title;
  $cloned_entity->uid = $uid;
  $cloned_entity->revision_uid = $uid;
  $cloned_entity->organization = array ( 'und' => array ( 0  => array ('target_id' => $organization_id))); //Custom entity reference field

  if ($cloned_entity) {
    entity_save('node', $cloned_entity);
  }