[sureglymop]

How do you sync to your own server? Do you mean just "some" data or did you figure out how to self host their open source (but undocumented) backend?

[austinjp]

My solution: auto-export to a folder then sync using your preferred method. Use the betterbibtex plugin to rename and move all necessary files. Fiddly to set up, but reliable once it's working.

[specproc]

I think it's just WebDAV, used to be at least.