How to install Langchain in Codex

To install Langchain in Codex, run "codex mcp add langchain -- npx -y @true402.dev/langchain" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 3 days ago

Run the install command

In a terminal, run:

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

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

Official Model Context Protocol server for Plunk — send email, manage contacts, campaigns and segments from an AI agent

MCP server for searching and fetching 6,500+ brand SVGs from thesvg.org

Turn long videos into viral vertical shorts and publish them to TikTok, Instagram and YouTube.

Does Langchain work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and Langchain installs with the steps above.

Langchain does not show up in Codex. What now?

Restart Codex 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.