LangChain
LangGraph
Low-level orchestration framework for building stateful, long-running agents as graphs with persistence and interrupts.
Install
Run in your terminal
pip install langgraph
Run in your terminal
npm install @langchain/langgraph
Latest version read from pypi package langgraph.
Multi-agent patterns
Subagents / agents as tools
A main agent calls other agents like tools and gets their result back, each with its own context.
How LangGraph does itGraph or workflow
You define steps and edges (or a workflow), and the framework runs agents and functions through them.
How LangGraph does itGroup chat / crew
Several agents with roles work together on a task, coordinated by a manager or a selection rule.
Not shown in the docs.
Human in the loop
The run pauses for a person to approve, edit or answer before it continues.
How LangGraph does itProtocols and hosting
Questions
Does LangGraph support MCP?
Yes. LangGraph's documentation shows agents using tools from MCP servers.
Does LangGraph support the A2A protocol?
Yes. LangGraph's documentation covers the Agent2Agent (A2A) protocol.
What multi-agent patterns does LangGraph support?
The docs show: handoffs, subagents / agents as tools, graph or workflow, human in the loop.
Links
Alternatives in the same languages
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Reviewed Oct 7, 2026.