AdYour product here, seen by people installing AI tools every day
AI Plugin Index
Sponsor slots open: 12 of 12, from $249 a month

How to install MCP Extensions in Codex

To install MCP Extensions in Codex, run "codex mcp add mcp-extensions -- npx -y @openai/mcp-extensions" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 11 days ago

  1. 1

    Run the install command

    In a terminal, run:

    codex mcp add mcp-extensions -- npx -y @openai/mcp-extensions
  2. 2

    Check it

    Inside Codex, type /mcp to see the server and its tools.

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

Install MCP Extensions in another app

Claude CodeClaude DesktopCursor VS CodeWindsurfGemini CLI Antigravity CLI ChatGPT

Similar servers

Harness autonomous-ai
95

Start Claude Code and Codex agents the person can watch, wait for them and read their answers.

AAA Local 1.3k
MCP Registry Server modelcontextprotocol
94

Publish and discover MCP servers via the official MCP Registry. Powered by HAPI MCP server.

AFA Remote 7.4k
ref-tools-ref-tools-mcp ref-tools
94

Provide your AI coding tools with token-efficient access to up-to-date technical documentation for…

AAA Remote 1.2k

Questions

Does MCP Extensions work in Codex?

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

MCP Extensions 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 MCP Extensions safe?

It scores 91 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.