Install MaxMindDB in Codex

What you need first

• Codex, installed.
• Docker, which gives the docker command the server starts with.
• Your own values for YOUR_MAXMINDDB_MCP_ACCOUNT_ID,YOUR_MAXMINDDB_MCP_LICENSE_KEY.

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 maxminddb-mcp --env MAXMINDDB_MCP_ACCOUNT_ID=YOUR_MAXMINDDB_MCP_ACCOUNT_ID --env MAXMINDDB_MCP_LICENSE_KEY=YOUR_MAXMINDDB_MCP_LICENSE_KEY -- docker run -i --rm -e MAXMINDDB_MCP_ACCOUNT_ID -e MAXMINDDB_MCP_LICENSE_KEY ghcr.io/oschwald/maxminddb-mcp:0.2.0

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

Check it worked

Ask Codex: List the tools of maxminddb-mcp.

If it does not start

Cannot connect to the Docker daemon

Docker is not running. Start it, then restart Codex.

The server starts, but its tools fail

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