clojure.core.server/start-server Will start a socket REPL at any point in your Clojure program. Unravel is a terminal-based REPL client you can use to connect

clojure.core.server/start-server Will start a socket REPL at any point in your Clojure program. Unravel is a terminal-based REPL client you can use to connect to that REPL: https://github.com/Unrepl/unravel https://github.com/Unrepl/unravel Alternately, for a smooth interactive development experience, including the ability to set breakpoints on lines, there is Cursive: https://github.com/cursive-ide/cursive https://github.com/cursive-ide/cursive Cursive is a plugin for IntelliJ. There's a free community edition of IntelliJ that works great.