Install Hamn in Codex

What you need first

• Codex, installed.
• Docker, which gives the docker command the server starts with.
• Your own values for YOUR_ASC_KEY_ID,YOUR_ASC_PRIVATE_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 hamn --env ASC_KEY_ID=YOUR_ASC_KEY_ID --env ASC_PRIVATE_KEY=YOUR_ASC_PRIVATE_KEY -- docker run -i --rm -e ASC_KEY_ID -e ASC_PRIVATE_KEY ghcr.io/idoo/hamn:0.1.3

2. Replace YOUR_ASC_KEY_ID,YOUR_ASC_PRIVATE_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 hamn.

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.