Warning:
USGS VPN may required to connect following asset
Official Pad Data Explorer
https://maps.usgs.gov/padusdataexplorer/
Folder Entrance Arcgis online REST service
https://transparentgov.net/json2tree/esri/server/folder.html?org=https%3A%2F%2Fservices.arcgis.com%2Fv01gqwM5QqNysAAi%2Farcgis%2Frest%2Fservices&url=https%3A%2F%2Fservices.arcgis.com%2Fv01gqwM5QqNysAAi%2Farcgis%2Frest%2Fservices&select_folder=678&select_layer=0
1. Folder Entrance Arcgis Server Portal REST service gis instance
https://transparentgov.net/json2tree/esri/server/folder.html?url=https%3A%2F%2Fgis.usgs.gov%2Fpadus%2Frest%2Fservices&org=USGS+Protected+Areas+PAD%2C%26nbsp%3B%26nbsp%3B&cross=default&timeout=10000&select_folder=14&select_layer=0
2. Folder Entrance Arcgis Server Portal REST service gis1 instance
https://transparentgov.net/json2tree/esri/server/folder.html?url=https%3A%2F%2Fgis1.usgs.gov%2Farcgis%2Frest%2Fservices&org=https%3A%2F%2Fgis1.usgs.gov%2Farcgis%2Frest%2Fservices&cross=default&timeout=10000&select_folder=21&select_layer=0
Arcgis online REST service endpoint ( ESRI hosted paid service)
https://services.arcgis.com/v01gqwM5QqNysAAi/arcgis/rest/services
1. Arcgis Server Portal REST service endpoint gis instance
https://gis.usgs.gov/padus/rest/services
2. Arcgis Server Portal REST service endpoint gis1 instance
https://gis1.usgs.gov/arcgis/rest/services