There are specific HN guidelines for Show HN postings (https://news.ycombinator.com/showhn.html https://news.ycombinator.com/showhn.html) and linked there is ad

There are specific HN guidelines for Show HN postings (https://news.ycombinator.com/showhn.html https://news.ycombinator.com/showhn.html) and linked there is additional helpful advice from the HN moderators (https://news.ycombinator.com/item?id=22336638 https://news.ycombinator.com/item?id=22336638). The guidelines ask "Please make it easy for users to try your thing out, ideally without barriers such as signups or emails. You'll get more feedback that way." so your submission may not qualify. If you have additional questions, the HN moderators can be reached at the email address in the guidelines linked at the bottom of the page.