Install Telegram MCP Server in Codex

What you need first

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

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 telegram-mcp-tdlib --env TDLIB_API_ID=YOUR_TDLIB_API_ID --env TDLIB_API_HASH=YOUR_TDLIB_API_HASH -- docker run -i --rm -e TDLIB_API_ID -e TDLIB_API_HASH ghcr.io/tolboy/telegram-mcp-tdlib:1.19.1-stdio

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

Check it worked

Ask Codex: List the tools of telegram-mcp-tdlib.

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.