Our public onion endpoint:

http://mcfftxiqtpwvrsly4..titn3frmf55frcleid.onion

If you want to host your own provider and appear in the marketplace just post a nostr message, mention nostr:npub130mznv74rxs032peqym6g3wqavh472623mt3z5w73xq9r6qqdufs7ql29s and add your onion url like in this message. We have a script in our backend that searches nostr for these messages and then includes your provider.