What it does
LangGraph is a code library for building AI agents, programs that take a series of steps to complete a task. It handles the behind-the-scenes plumbing so agents can run for long periods and pick up where they left off if something fails.
It lets a person check and change what an agent is doing at any point, and gives agents both short-term and long-term memory. It's made by the team behind LangChain and works with their other tools, but can be used on its own.
Who it's for
Software developers building reliable AI agents and multi-step AI workflows.
Can I use it without coding?
Developers only. A Python library (with a JavaScript version) used by writing code. New to this? Start here.
Can I run it?
- Cost
- FreeNothing to pay or sign up for.
- API key
- Not needed
Try it
Using Claude Code, Cursor or another AI coding assistant? Paste the prompt and it will walk you through the setup.New to this?
Before you install
- Only download from the official GitHub page. Copies with similar names exist for many popular projects.
- License (MIT): Very permissive: free to use, change and share, including for business.
- More on staying safe