Language Server Protocol support#


As of JupyterLab 4.2, there is no user-facing integration of Language Server Protocol (LSP); to take advantage of LSP you need to install an extension, such as jupyterlab-lsp.

JupyterLab ships with components enabling extensions to handle and communicate with language servers.

The LSP service is disabled by default, it can be enabled by togging the Activate option in the Language Servers section of the setting page. Enabling the service will not have any effect unless extensions providing integration with the editor (or other elements of JupyterLab UI) are installed.


By default JupyterLab does not come with any language servers installed. For the list of LSP servers tested with jupyter-lsp, the jupyter-server extension which spawns and communicates with the servers, see the documentation of the extension.


The settings for language servers can be found on the settings page of JupyterLab (Settings > Settings Editor > Language Servers (Experimental)).

  • Activate: this option allows users to enable or disable the LSP services.

  • Language Server: this section allows users to configure the installed language servers.


Language servers setting page.#

Please note that this settings page will be replaced by a more sophisticated editor accessible under Language Servers section when jupyterlab-lsp is installed.