Problem: There is no officially support method for a torrent client to obtain the currently active forwarded port from Proton VPN.

Current practices: The only way I've found to determine the port is to scrape the VPN client log. This is not officially supported and thus brittle, not to mention inefficient.

Proposed solution: Add a lightweight REST listener in the client to respond to API requests. Including forwarded port status, so that a local client can determine if the VPN is currently active, if port forwarding is enabled, and what the current port is. A unified cross-platform client API would be ideal.