How to install Metaharness in Codex

To install Metaharness in Codex, run "codex mcp add metaharness -- npx -y metaharness" in your terminal, then type /mcp in Codex to check it.

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Run the install command

In a terminal, run:

codex mcp add metaharness -- npx -y metaharness

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

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Does Metaharness work in Codex?

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

Metaharness 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 Metaharness safe?

It scores 92 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.