Here's an example. I haven't dug into their various codebases deep enough to know if this is only cache server or also client, but checkout the image linked on Nostrudel

noStrudel

A simple nostr web client focused on exploring nostr

And on Primal:

Silberengel

(a community relay) and (a document relay), from #GitCitadel, are two of the Top-30 liveliest #relays, now. No spam, no porn, no scammers. Just re...

Same event, but different image files. Makes it look like I use their media server, but I didn't. I used Nostr.build.