Install Vikunjamcp in Codex

What you need first

• Codex, installed.
• Docker, which gives the docker command the server starts with.
• Your own values for YOUR_VIKUNJA_URL,YOUR_VIKUNJA_USERNAME,YOUR_VIKUNJA_PASSWORD.

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 vikunjamcp --env VIKUNJA_URL=YOUR_VIKUNJA_URL --env VIKUNJA_USERNAME=YOUR_VIKUNJA_USERNAME --env VIKUNJA_PASSWORD=YOUR_VIKUNJA_PASSWORD -- docker run -i --rm -e VIKUNJA_URL -e VIKUNJA_USERNAME -e VIKUNJA_PASSWORD docker.io/idjohnson/vikunjamcp:0.26

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

Check it worked

Ask Codex: List the tools of vikunjamcp.

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.