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nREPL is a Clojure network REPL that provides a REPL server and client, along with some common APIs of use to IDEs and other tools that may need to evaluate Clojure code in remote environments.

How is this different from the "contrib" tools.nrepl project?

Check the brief history of nREPL, available here.


Extremely stable. nREPL's protocol and API are rock-solid and battle tested. nREPL's team pledges to evolve them only in backwards-compatible ways.

That being said, there were a few organizational changes related to the transition out of clojure-contrib that everyone has to keep in mind:

  • [nrepl "0.3.1"] is a drop-in replacement for [org.clojure/tools.nrepl "0.2.13"] (notice the different artifact coordinates).
  • [nrepl "0.4.0"] changes the namespaces from* to nrepl.*.

A later 1.0.0 release will include fixes for all previously-reported but languishing nREPL issues. Future releases will focus on supporting the needs of the essential tools of the Clojure(Script) ecosystem (e.g. Leiningen, Boot, CIDER, Cursive).


See the manual.

API Documentation

You can find nREPL's API documentation on cljdoc.


Copyright © 2010-2018 Chas Emerick, Bozhidar Batsov and contributors.

Licensed under the EPL. (See the file epl.html.)

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