I did something like this for webmentions: <a href="http:&#x2F;&#x2F;jekmentions.alhur.es&#x2F;" rel="nofollow">http:&#x2F;&#x2F;jekmentions.alhur.es&#x2F;</a><p>It&#x27;s a simple backend (so you don&#x27;t need your own). It could well be done for comments (someone hosting the backend for free on Heroku or something like that).