How to install Serena MCP: the IDE for your agent in Codex

To install Serena MCP: the IDE for your agent in Codex, run "codex mcp add serena-mcp-the-ide-for-your-agent -- uvx serena-agent" 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 serena-mcp-the-ide-for-your-agent -- uvx serena-agent

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

MCP servers run with your permissions. If Serena MCP: the IDE for your agent needs an API key, add it under env in the config. Check its README.

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Questions

Does Serena MCP: the IDE for your agent work in Codex?

Yes. Codex supports mcp servers in the codex cli and ide extension, and Serena MCP: the IDE for your agent installs with the steps above.

Serena MCP: the IDE for your agent 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 Serena MCP: the IDE for your agent safe?

It scores 88 of 100. Review the code before you install it, and only give it the access it needs. Grades and details.