How to install Langchain in Gemini CLI

Gemini CLI was replaced by Antigravity CLI in June 2026. On an enterprise licence or paid API key you can still install Langchain by running "gemini mcp add langchain npx -y @true402.dev/langchain", then type /mcp to check it.

Built from the published package · server updated 4 days ago

Run the install command

In a terminal, run:

gemini mcp add langchain npx -y @true402.dev/langchain

2
Check it
Inside Gemini CLI, type /mcp to list servers and tools.

MCP servers run with your permissions. If Langchain needs an API key, add it under env in the config. Check its README.

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Questions

Does Langchain work in Gemini CLI?

Yes. Gemini CLI supports local and remote mcp servers, extensions (legacy), and Langchain installs with the steps above.

Langchain does not show up in Gemini CLI. What now?

Restart Gemini CLI fully, check the JSON is valid, and make sure Node.js (for npx) is installed. See common MCP errors and fixes.

Is Langchain safe?

It scores 70 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.