Huh, cool. I was going to say that the X-Tidal-Token header makes it seem like authentication is still needed, but it sounds from https://github.com/spencercharest/tidal-api/issues/12 like the token that you mentioned has been working since May 2020 (if not earlier), so it’s probably reasonably safe to depend on it.
Does Tidal carry much in the way of material that can’t be seeded from somewhere else? If so, I’d be willing to add support for seeding releases from there using yambs. (I don’t do much/any streaming, so I haven’t used Tidal since they shut their store down last year.)