ArcGIS REST URL ending in /FeatureServer/N or /MapServer/N. Public services need no sign-in; for a secured service, add a token or your ArcGIS credentials below.
/FeatureServer/N
/MapServer/N
A short-lived token is generated in your browser and stored with the map; your password is never sent to this server or saved.
Click a map to load it. Saved maps live in ./maps/*.json on the server and restore the basemap, layers, view, and per-layer styling exactly as they were when saved.
./maps/*.json