all esri based map support secure token now
https://transparentgov.net/json2tree/datahub.io/usgs/explore.html?backgroundlayerurl=https%3A%2F%2Fservices.arcgis.com%2Ff48yV21HSEYeCYMI%2Farcgis%2Frest%2Fservices%2FFacilities_Maintenance%2FFeatureServer%2F6&arcgis_online_token=Q9aQ5sS8Eyjfn3vDWuSCykqwxs4FNN4HuTPvw4if96h1qQK41A_8qTsidQ6u2IqfYULbSxKB616QzJIPk3h7dh7Ro6AxfB2jJKDPVdPlydqbLjFmGcl-bIk-gT3U5yIauk604xArXRN4GpFk19XOJLi8QFxa4GsAeDST8FOW93EBPiv6PNj-nq-bu8BcuFhh&layer=Electrical+Pedestals&_center_zoom=21&_center_lat=33.808242052037514&_center_long=-116.5449926319944
Only marked as 'Token', can support secure token. So far, all ESRI map and 2 google map support secure 'Token'
https://transparentgov.net/json2tree/esri/server2/searchLayer.html?org=https%3A%2F%2Fservices.arcgis.com%2Ff48yV21HSEYeCYMI%2Farcgis%2Frest%2Fservices&url=https%3A%2F%2Fservices.arcgis.com%2Ff48yV21HSEYeCYMI%2Farcgis%2Frest%2Fservices&select_folder=1&select_layer=0&arcgis_online_token=&filter_by=