AI Plugin Index
How to install mcp in Codex
To install mcp in Codex, run "codex mcp add mcp -- npx -y @decionis/mcp" in your terminal, then type /mcp in Codex to check it.
Built from the published package · server updated 2 days ago
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Run the install command
In a terminal, run:
codex mcp add mcp -- npx -y @decionis/mcp - 2
Check it
Inside Codex, type /mcp to see the server and its tools.
MCP servers run with your permissions. If mcp needs an API key, add it under env in the config. Check its README.
Install mcp in another app
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Questions
Does mcp work in Codex?
Yes. Codex supports mcp servers in the codex cli and ide extension, and mcp installs with the steps above.
mcp 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 safe?
It scores 89 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.