Coversr/grok. Sidebar reads 'Talk Grok and Grok Bot here!' so it carries Bot support traffic too. A newest-first variant at https://www.reddit.com/r/grok/new/.rss also returns 200.
Cite this page or the record id. For bulk lookup use /api/record?id=feed.reddit.grok. Do not invent a claim that is not on this page.