Skip to content

LangGraph CLI

Prerequisites

The LangGraph CLI is a multi-platform command-line tool for building and running the LangGraph API server locally. This offers an alternative to the LangGraph Studio desktop app for developing and testing agents across all major operating systems (Linux, Windows, MacOS). The resulting server includes all API endpoints for your graph's runs, threads, assistants, etc. as well as the other services required to run your agent, including a managed database for checkpointing and storage.

Installation

The LangGraph CLI can be installed via Homebrew (on macOS) or pip:

brew install langgraph-cli

pip install langgraph-cli

Commands

The CLI provides the following core functionality:

build

The langgraph build command builds a Docker image for the LangGraph API server that can be directly deployed.

dev

New in version 0.1.55

The langgraph dev command was introduced in langgraph-cli version 0.1.55.

Python only

Currently, the CLI only supports Python >= 3.11. JS support is coming soon.

The langgraph dev command starts a lightweight development server that requires no Docker installation. This server is ideal for rapid development and testing, with features like:

  • Hot reloading: Changes to your code are automatically detected and reloaded
  • Debugger support: Attach your IDE's debugger for line-by-line debugging
  • In-memory state with local persistence: Server state is stored in memory for speed but persisted locally between restarts

To use this command, you need to install the CLI with the "inmem" extra:

pip install -U "langgraph-cli[inmem]"

Note: This command is intended for local development and testing only. It is not recommended for production use. Since it does not use Docker, we recommend using virtual environments to manage your project's dependencies.

up

The langgraph up command starts an instance of the LangGraph API server locally in a docker container. This requires thedocker server to be running locally. It also requires a LangSmith API key for local development or a license key for production use.

The server includes all API endpoints for your graph's runs, threads, assistants, etc. as well as the other services required to run your agent, including a managed database for checkpointing and storage.

dockerfile

The langgraph dockerfile command generates a Dockerfile that can be used to build images for and deploy instances of the LangGraph API server. This is useful if you want to further customize the dockerfile or deploy in a more custom way.

Comments