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The primary manifest — the file an agent reads to learn what this artifact does.
langchain-mcp
Note: langchain now has a more official implementation [langchain-mcp-adapters](https://github.com/langchain-ai/langchain-mcp-adapters)
Model Context Protocol tool calling support in LangChain.
Create a langchain_mcp.MCPToolkit with an mcp.ClientSession, then await toolkit.initialize() and toolkit.get_tools() to get the list of langchain_core.tools.BaseTools.
Example:
https://github.com/rectalogic/langchain-mcp/blob/8fa8445a24755bf91789f52718c32361ed916f46/tests/demo.py#L34-L43
Demo
You can run the demo against Groq llama-3.1-8b-instant:
$ export GROQ_API_KEY=xxx
$ uv run tests/demo.py "Read and summarize the file ./LICENSE"
Secure MCP Filesystem Server running on stdio
Allowed directories: [ '/users/aw/projects/rectalogic/langchain-mcp' ]
The file ./LICENSE is a MIT License agreement. It states that the software is provided "as is" without warranty and that the authors and copyright holders are not liable for any claims, damages, or other liability arising from the software or its use.