How to install Signer in Codex

To install Signer in Codex, run "codex mcp add signer -- npx -y @haven_ai/signer" 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 signer -- npx -y @haven_ai/signer

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

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Does Signer work in Codex?

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

Signer 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 Signer safe?

It scores 75 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.