It's called Plaudit.pub [1] and launched not too long ago. The aim is for preprint servers (and eventually journals) to display endorsements right next to the r

It's called Plaudit.pub [1] and launched not too long ago. The aim is for preprint servers (and eventually journals) to display endorsements right next to the research they host, but more most of them, this currently requires a browser extension. Also note that it currently only provides a solution for the endorsement part of evaluation - you'd still have to use, say, email or a comment form to provide actual feedback. [1] https://plaudit.pub/ https://plaudit.pub/