wss://nostr.oxtr.dev is now exposed as an #onion service!
I've tested it using Snort's hidden service in the Tor browser and it seems to connect pretty quickly. Reach out if you experience any issues.
ws://oxtrdevav64z64yb7x6rjg4ntzqjhedm5b5zjqulugknhzr46ny2qbad.onion