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How to install What Devtools MCP in Codex

To install What Devtools MCP in Codex, run "codex mcp add what-devtools-mcp -- npx -y what-devtools-mcp" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 2 days ago

  1. 1

    Run the install command

    In a terminal, run:

    codex mcp add what-devtools-mcp -- npx -y what-devtools-mcp
  2. 2

    Check it

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

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

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Questions

Does What Devtools MCP work in Codex?

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

What Devtools 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 What Devtools MCP safe?

It scores 64 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.