---
id: jupyter-client
version: "8.9.1"
license: BSD 3-Clause License - Copyright (c) 2001-2015, IPython Development Team - Copyright (c) 2015-, Jupyter Development Team All rights reserved. Redistribution and use in source and binary forms, with… (full text in the JSON record)
license_treatment: permissive
maintenance: active
---

# jupyter-client — Jupyter protocol implementation and client libraries

License: permissive · Maintenance: active · Popularity: top 1,000 on PyPI

## Install

pip install jupyter-client
uv add jupyter-client
poetry add jupyter-client

## Description

# Jupyter Client

[![Build Status](https://github.com/jupyter/jupyter_client/workflows/CI/badge.svg)](https://github.com/jupyter/jupyter_client/actions)
[![Documentation Status](https://readthedocs.org/projects/jupyter-client/badge/?version=latest)](http://jupyter-client.readthedocs.io/en/latest/?badge=latest)

`jupyter_client` contains the reference implementation of the [Jupyter protocol].
It also provides client and kernel management APIs for working with kernels.

It also provides the `jupyter kernelspec` entrypoint
for installing kernelspecs for use with Jupyter frontends.

## Development Setup

The [Jupyter Contributor Guides](https://jupyter.readthedocs.io/en/latest/contributing/content-contributor.html) provide extensive information on contributing code or documentation to Jupyter projects. The limited instructions below for setting up a development environment are for your convenience.

## Coding

You'll need Python and `pip` on the search path. Clone the Jupyter Client git repository to your computer, for example in `/my/project/jupyter_client`

```bash
cd /my/projects/
git clone git@github.com:jupyter/jupyter_client.git
```

Now create an [editable...

## AI interpretation — verify before relying

jupyter-client implements the Jupyter protocol and provides APIs for managing kernel lifecycle and communication, plus the `jupyter kernelspec` command for installing kernel specifications.

Verdict: Stable, actively maintained core Jupyter infrastructure with no known vulnerabilities. Low install friction, permissive license, and top-1000 popularity make it a reliable choice for applications needing kernel management or Jupyter protocol support.

[View on SkillFed](https://skillfed.io/packages/jupyter-client) · [View on PyPI](https://pypi.org/project/jupyter-client/)