MADEX on Nostr: yes.

{ "id": "977487951b8f5c9be7661f54d016069e6e7d6064ccf54c4c5771f4cd02cb537c", "pubkey": "9b6d95b76a01191a4c778185681ed7f3bced2fffa8e41516ec78240b213285f5", "created_at": 1769642781, "kind": 1, "tags": [ [ "e", "8d80fce7b42b550fad2b44c31fb21d52e4c29b89ea0d67b90b7204bdfa09f5ca", "", "root" ], [ "e", "441b0f48ea37e02b375b5b6ecb3213b92ab36ed04f2609680a7de4349becc901", "", "reply" ], [ "p", "9b6d95b76a01191a4c778185681ed7f3bced2fffa8e41516ec78240b213285f5", "", "mention" ], [ "p", "0d7bc80dd68cf09d239aa8b088c29d951e9828231f825acbb8b1a3b8aaf2218d" ], [ "r", "wss://nostr-pub.wellorder.net/" ], [ "r", "wss://relay.damus.io/", "write" ], [ "r", "wss://relay.mostr.pub/" ], [ "r", "wss://nos.lol/" ], [ "r", "wss://nostr.wine/" ], [ "r", "wss://nostr.oxtr.dev/" ], [ "r", "wss://atlas.nostr.land/" ], [ "r", "wss://offchain.pub/" ], [ "r", "wss://relay.snort.social/" ], [ "r", "wss://eden.nostr.land/", "write" ], [ "r", "wss://nostr-pub.semisol.dev/" ] ], "content": "yes.", "sig": "4aaaee2e2f384ed305199912a538883b9a03541477b36baefb6513e506046216be1c7de9179580f6da29f705dad237263b4ef4f7bd19ca722da3aaee19488bab" }