Install Gtm Ga4 in Codex

What you need first

• Codex, installed.
• Node.js, which gives the npx command the server starts with.
• Your own values for YOUR_GOOGLE_APPLICATION_CREDENTIALS,YOUR_GTM_ACCOUNT_ID,YOUR_GTM_CONTAINER_ID.

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 gtm-ga4 --env GOOGLE_APPLICATION_CREDENTIALS=YOUR_GOOGLE_APPLICATION_CREDENTIALS --env GTM_ACCOUNT_ID=YOUR_GTM_ACCOUNT_ID --env GTM_CONTAINER_ID=YOUR_GTM_CONTAINER_ID -- npx -y [email protected]

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

Check it worked

Ask Codex: List the tools of gtm-ga4.

If it does not start

spawn npx ENOENT

Node.js is not on the PATH that Codex sees. Install it, or write the full path of npx in the config.

The server starts, but its tools fail

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