Start a viewer
viewer_url and a short-lived auth_key.
View-only mode
Auth key and raw stream info
desktop.stream.info() (GET /desktop/stream) exposes the lower-level raw
vnc:// surface for advanced clients, and is only available when raw VNC
exposure is enabled in API policy. The auth-key route returns both the active
auth_key and the matching viewer_url. For browser sharing and inspection,
prefer stream.viewer_url from start().