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How to install Agentic Engineering Harness in Codex
To install Agentic Engineering Harness in Codex, run "codex mcp add agentic-engineering-harness -- npx -y agentic-engineering-harness" 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 agentic-engineering-harness -- npx -y agentic-engineering-harness - 2
Check it
Inside Codex, type /mcp to see the server and its tools.
MCP servers run with your permissions. If Agentic Engineering Harness needs an API key, add it under env in the config. Check its README.
Install Agentic Engineering Harness in another app
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Questions
Does Agentic Engineering Harness work in Codex?
Yes. Codex supports mcp servers in the codex cli and ide extension, and Agentic Engineering Harness installs with the steps above.
Agentic Engineering Harness 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 Agentic Engineering Harness safe?
It scores 87 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.