Adding api function

I would do it the way that we use for the billing module. Write your own class that extends the current remote api class, then create a new remote api endpoint file similar to this one:

Code:

<?php

require_once '../../lib/config.inc.php';
$conf['start_session'] = false;
require_once '../../lib/app.inc.php';

if($conf['demo_mode'] == true) $app->error('This function is disabled in demo mode.');

$app->load('remoting');
$app->load('billing_remote');
$app->uses('remoting_lib');

$server = new SoapServer(null, array('uri' => $_SERVER['REQUEST_URI']));
$server->setClass('billing_remote');
$server->handle();

?>