Have a publicly exposed web HTTP API to serve the list of your servers in a formatted way such as JSON. In the laziest case, you can just serve a static JSON file from your reverse proxy.

This would be similar to https://api.mullvad.net/www/relays/all/ and would ideally serve both OpenVPN and Wireguard server information.

I need this to implement a better server information updating mechanism in my project https://github.com/qdm12/gluetun (with 100,000s of users), since for now it just downloads and extracts one of your OpenVPN zip file from 2020.