I mean isn’t Lemmy licensed under the AGPL? I’m just asking because AFAIK a proprietary client is not even allowed under this license.
You couldn’t make a proprietary server. Client is fine, AGPL doesn’t apply when you are accessing the server over a public API.
AGPL doesn’t apply when you are accessing the server over a public API.
The AGPL does apply when interacting with the covered work (Lemmy server) over a network. A proprietary client would still nevertheless be required, upon request, to furnish you with the source code of the covered work it is talking to over the network (the Lemmy server).