AI Plugin Index
How to install agent-harnesses in Codex
To install agent-harnesses in Codex, run "codex mcp add agent-harnesses -- uvx agent-harnesses-mcp" 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 agent-harnesses -- uvx agent-harnesses-mcp - 2
Check it
Inside Codex, type /mcp to see the server and its tools.
MCP servers run with your permissions. If agent-harnesses needs an API key, add it under env in the config. Check its README.
Install agent-harnesses in another app
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Questions
Does agent-harnesses work in Codex?
Yes. Codex supports mcp servers in the codex cli and ide extension, and agent-harnesses installs with the steps above.
agent-harnesses does not show up in Codex. What now?
Restart Codex fully, check the JSON is valid, and make sure uv (for uvx) is installed. See common MCP errors and fixes.
Is agent-harnesses safe?
It scores 86 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.