Those addons can be used by Agile Toolkit. 1. Install Agile Toolkit into "atk4" 2. Install addons into "ambient-addons" 3. Inside your API include addons through addLocation():	$this->addLocation('/',array(	'addons'=>array('ambient-addons')	)) ->setRelativePath('/') ->setParent($this->pathfinder->base_location);