Install Lucius MCP in Codex

What you need first

• Codex, installed.
• uv, which gives the uvx command the server starts with.
• Your own values for YOUR_ALLURE_ENDPOINT,YOUR_ALLURE_PROJECT_ID,YOUR_ALLURE_API_TOKEN.

Steps

1. Run this in a terminal. It writes the server into ~/.codex/config.toml, which the Codex CLI, its IDE extension and the ChatGPT desktop app share.

codex mcp add lucius-mcp --env ALLURE_ENDPOINT=YOUR_ALLURE_ENDPOINT --env ALLURE_PROJECT_ID=YOUR_ALLURE_PROJECT_ID --env ALLURE_API_TOKEN=YOUR_ALLURE_API_TOKEN -- uvx lucius-mcp==0.16.8

2. Replace YOUR_ALLURE_ENDPOINT,YOUR_ALLURE_PROJECT_ID,YOUR_ALLURE_API_TOKEN with your own values.
3. Start Codex again and type /mcp: the server is listed.

Check it worked

Ask Codex: List the tools of lucius-mcp.

If it does not start

spawn uvx ENOENT

uv is not on the PATH that Codex sees. Install it, or write the full path of uvx in the config.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.