is there any API to lansweeper to create an own helpdesk software or any other solutions to opensource projects, so mean a plugin in e.g. OTRS or some else?
This feature is on our road map, but we do not currently have a release date for it. A few other companies have integrated their own help desk software with Lansweeper however. An example can be found here: http://www.sharepoint-applications.biz/asset_tracking.html