Shout-out to Damus relay which accepts filters with negentropy nostr:nprofile1qqsr9cvzwc652r4m83d86ykplrnm9dg5gwdvzzn8ameanlvut35wy3g4h5cp7 , havent found any other relays that allow it?
Isn't that how negentropy works? By sending filters? Or are you talking about some non standard thing? Anyhow, most khatru-based relays should have support
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