Look into the Indieweb[1] and Webmentions[2]. Still really early days, but they're what you're after, I think. Well, if you're talking about commenting on other

Look into the Indieweb[1] and Webmentions[2]. Still really early days, but they're what you're after, I think. Well, if you're talking about commenting on others' posts. I'd think to follow, you'd use RSS or ActivityPub. [1]: https://indieweb.org/ https://indieweb.org/ [2]: https://indieweb.org/Webmention https://indieweb.org/Webmention