Webmention.io
I've been using Webmention.io on my own site (<a href="https://rasulkireev.com" rel="nofollow">https://rasulkireev.com</a>) and it works beautifully.<p>A lot of frameworks and static site builders have a plugin to integrate webmentions on one site.<p>I believe this came from the Indieweb movement, which I am a huge fun of.