Install DB MCP Server in Codex

What you need first

• Codex, installed.
• uv, which gives the uvx command the server starts with.
• Your own values for YOUR_DB_TYPE,YOUR_DB_DATABASE.

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 db --env DB_TYPE=YOUR_DB_TYPE --env DB_DATABASE=YOUR_DB_DATABASE -- uvx db-mcp-server==1.2.1

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

Check it worked

Ask Codex: List the tools of db.

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.