For years, the Richardson Maturity Model has been the standard by which an API design has been gauged. Awhile later, Mike Amundsen proposed his own Maturity Model. In this edition of the REST API Notes newsletter, Zdenek Nemec summarizes and contrasts the two models. It's a thoughtful decomposition that leads to additional insights.
You can find the web version of the newsletter email here: https://tinyletter.com/NetAPINotes/letters/rest-api-notes-for-2018-04-19
Past editions of the newsletter can be found here: http://tinyletter.com/NetAPINotes/archive.
A comprehensive list of upcoming web events that I maintain can be found at webapi.events.