Redis client library. Supports GNU Prolog, LVM, Qu-Prolog, SICStus Prolog, SWI-Prolog, and XSB. Support for Ciao Prolog and ECLiPSe is also included but requires fixes for issues in these systems.

For general information on Redis, including a list of the available commands, visit:

API documentation

Open the ../../docs/library_index.html#redis link in a web browser.


To load this library, load the loader.lgt file:

| ?- logtalk_load(redis(loader)).


To test this library predicates, load the tester.lgt file:

| ?- logtalk_load(redis(tester)).

The tests assume a localhost Redis server running on the default port (6379) if the REDIS_HOST and REDIS_PORT environment variables are not defined. If the server is not detected, the tests are skipped.

The unit tests were originally written by Sean Charles for his GNU Prolog Redis client library:

The Logtalk version is a straight-forward port of the original tests using the test/1 dialect of lgtunit.


This library is inspired by the Sean Charles GNU Prolog Redis client library.

Known issues

Recent version of macOS seem to disable the mapping of localhost to This issue may prevent running this library unit tests and the redis::connect/1 from working. This can be fixed either by editing the /etc/hosts file or by using in alternative the predicateredis::connect/3with’’` as first argument.