I haven’t tried it but I’ve been thinking about it… Since NextCloud supports s3 storage it would seem its photo apps, such as Memories should work that way?

Thanks for the link. Yeah, my server is old. COPS is old, but still works great for me. .

Calibre has built in server, but while running server (last I checked) it locks the db so you can’t do much with the Gui, can’t add books etc. Also I’m already running a a web server with php so it’s more efficient just to slap the COPS web app there rather than run yet another server.

Similarly I use COPS (php calibre front-end)… But with no users or auth. If you can guess the URL you are in! Exciting.

Works well with nextcloud also.