https://github.com/rectalogic/langchain-mcp
Model Context Protocol tool support for LangChain
https://github.com/rectalogic/langchain-mcp
Last synced: 4 months ago
JSON representation
Model Context Protocol tool support for LangChain
- Host: GitHub
- URL: https://github.com/rectalogic/langchain-mcp
- Owner: rectalogic
- License: mit
- Created: 2024-11-26T15:05:28.000Z (over 1 year ago)
- Default Branch: main
- Last Pushed: 2025-04-02T15:18:46.000Z (over 1 year ago)
- Last Synced: 2025-09-02T15:26:34.150Z (10 months ago)
- Language: Python
- Size: 185 KB
- Stars: 197
- Watchers: 3
- Forks: 25
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# langchain-mcp
*Note: langchain now has a more official implementation [langchain-mcp-adapters](https://github.com/langchain-ai/langchain-mcp-adapters)*
[Model Context Protocol](https://modelcontextprotocol.io) 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.BaseTool`s.
Example:
https://github.com/rectalogic/langchain-mcp/blob/8fa8445a24755bf91789f52718c32361ed916f46/tests/demo.py#L34-L43
## Demo
You can run the demo against [Groq](https://groq.com/) `llama-3.1-8b-instant`:
```sh-session
$ 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.
```