It supports cjson and simplejson, and looks for the parsers in that order (searching first for cjson, then for the built-in json in 2.7+, and then the simplejson external library). One of these must be installed to use this library, although if you have a standard distribution of 2.7+, you should already have one. Keep in mind that cjson is supposed to be the quickest, I believe, so if you are going for full-on optimization you may want to pick it up.


You can install the latest stable version from PyPI with the following command:

# Global installation
pip install jsonrpclib-pelix

# Local installation
pip install --user jsonrpclib-pelix

Alternatively, you can install the latest development version:

pip install git+

Finally, you can download the source from the GitHub repository at and manually install it with the following commands:

git clone git://
cd jsonrpclib
python install


Tests are an almost-verbatim drop from the JSON-RPC specification 2.0 page. They can be run using unittest or nosetest:

python -m unittest discover tests
python3 -m unittest discover tests
nosetests tests