How to install WARDEN — MCP Security Firewall in Codex

To install WARDEN — MCP Security Firewall in Codex, run "codex mcp add warden-mcp-security-firewall -- npx -y @aimarket/warden" in your terminal, then type /mcp in Codex to check it.

Built from the published package · server updated 3 days ago

Run the install command

In a terminal, run:

codex mcp add warden-mcp-security-firewall -- npx -y @aimarket/warden

2
Check it
Inside Codex, type /mcp to see the server and its tools.

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

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Questions

Does WARDEN — MCP Security Firewall work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and WARDEN — MCP Security Firewall installs with the steps above.

WARDEN — MCP Security Firewall 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 WARDEN — MCP Security Firewall safe?

It scores 79 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.