I've been working on some API I just published on GitHub - SBB-Mx/Qualys: Qualys API
listOlderAssets.py: with this API you can find devices with more than X days whit out been scan
python ListOlderAsset_v1.1.py "DAYS"
python ListOlderAsset_v1.1.py 200
sheachanddelete.py: with this API you can search and purge devices from qualys
python SearchAndDelete_v1.1.py -s X.X.X.X
python SearchAndDelete_v1.1.py -d X.X.X.X