Install pREST in Codex

What you need first

• Codex, installed.
• Docker, which gives the docker command the server starts with.
• Your own value for YOUR_PREST_MCP_URL.

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 prest --env PREST_MCP_URL=YOUR_PREST_MCP_URL -- docker run -i --rm -e PREST_MCP_URL ghcr.io/prest/prest-mcp-adapter:0.1.3

2. Replace YOUR_PREST_MCP_URL with your own value.
3. Start Codex again and type /mcp: the server is listed.

Check it worked

Ask Codex: List the tools of prest.

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.