setup/includes/upgrades/common/2.5.5-ssl-provider.php
<?php
/**
* Common upgrade script for 2.5.5 to update provider URL to SSL
*
* @var modX $modx
* @package setup
*/
$nonSSLProvider = $modx->getObject('transport.modTransportProvider', array('service_url' => 'http://rest.modx.com/extras/'));
if ($nonSSLProvider) {
$nonSSLProvider->set('service_url', 'https://rest.modx.com/extras/');
$nonSSLProvider->save();
}