What is Ratpack?Ratpack is a set of Java libraries for building scalable HTTP applications. It is a lean and powerful foundation, not an all-encompassing framework. Want to know more? Check out the manual. More the bookish type? Get “Learning Ratpack” from O'Reilly Media. Have a question or problem? Discuss it now via the Ratpack Community Channel (powered by Slack). One time sign up is required.