Another API description

Resources

Calendars

Resource Description
POST /api/external/calendars/ical Proxy an external iCal feed (Preview modal)
GET /api/external/calendars/:id/ical Re-fetch a saved calendar feed (Events tab / Refresh)

Ical

Resource Description
POST /api/external/ical/verify Verify an external iCal link (Add-iCal modal "Continue")