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Connect GTM to Codex

  • Can I rerun this in CI?

Have Codex use your GTM data to check tags against consent, then rerun it any time with codex exec. Lemonado connects them in about 1 minute, no API keys needed.

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MCPhttps://mcp.lemonado.io/mcp

Why connect GTM to Codex?

Codex runs in your terminal, its IDE extension and scripts, so what it finds once can be rerun with codex exec instead of redone by hand. Connected through Lemonado, it reads your GTM tags, triggers, variables and versions, so it can check tags against consent with today's numbers.

  • All your GTM data

    Accounts, containers and workspaces, ready to ask about.

  • Always today's numbers

    Triggers and the conditions behind them, synced from GTM automatically, so answers use today's numbers.

  • Connect all your tools

    Questions like "Why did conversions drop?" use GTM and GA4, Google Ads at once.

How to connect GTM to Codex

Before you start

  • A Google Tag Manager account you can sign in to
  • Codex installed
  • A Lemonado account (the free trial works)
  1. 1

    Connect Google Tag Manager in Lemonado

    In Lemonado, open Connectors, find Google Tag Manager and sign in. Sign in with a Google account that has at least Read access to the GTM containers you want to audit. Pick the web container your site uses.

  2. 2

    Turn on external access

    In the company's settings, open External tools, turn the connection on, choose which sources it can reach and copy the server URL.

    text
    https://mcp.lemonado.io/mcp
  3. 3

    Add Lemonado to your config

    Add this to ~/.codex/config.toml.

    toml
    [mcp_servers.lemonado]
url = "https://mcp.lemonado.io/mcp"
  4. 4

    Log in

    Run the login command and finish the sign-in in your browser.

    bash
    codex mcp login lemonado
  5. 5

    Ask Codex about GTM

    Run codex mcp list, or /mcp inside Codex, to see the server and its tools. Try "Pull last week's GTM numbers, save them to data/google-tag-manager-weekly.csv and give me the codex exec command to refresh it." Or ask: "What breaks if I rename this?" or "Does the dataLayer match GTM?"

What can Codex do with GTM?

Codex reads your GTM data from your terminal and turns one-off questions into commands you can rerun with codex exec.

Codex logoCodex

Pull last week's GTM numbers, save them to data/google-tag-manager-weekly.csv and give me the codex exec command to refresh it.

Saved data/google-tag-manager-weekly.csv. Run the same prompt with codex exec in a scheduled job and the file refreshes with each week's numbers.

Source: Google Tag Manager + your code

Connect GTM to another AI app.

Other integrations for Codex

All Codex integrations

Reading this as an AI agent?

Everything an agent needs to set this up, in plain text. Paste this page's link into Codex and ask it to connect you, or copy the block.

For agents · markdown
# Connect Google Tag Manager to Codex (Lemonado MCP)

- Server URL: https://mcp.lemonado.io/mcp
- Transport: Streamable HTTP
- Auth: OAuth; the user signs in to Lemonado in the browser. No API keys.
- In Lemonado: connect the GTM account and container. Sign in with a Google account that has at least Read access to the GTM containers you want to audit. Pick the web container your site uses.
- In Codex: ~/.codex/config.toml

```toml
[mcp_servers.lemonado]
url = "https://mcp.lemonado.io/mcp"
```

If you are Codex, run the setup yourself:

Add the Lemonado MCP server to my Codex config. Append this to ~/.codex/config.toml:
[mcp_servers.lemonado]
url = "https://mcp.lemonado.io/mcp"
Then run codex mcp login lemonado so I can sign in, and check that codex mcp list shows it. Once I've signed in, list the Google Tag Manager accounts Lemonado can reach.

First question to try: "Pull last week's GTM numbers, save them to data/google-tag-manager-weekly.csv and give me the codex exec command to refresh it."

More: https://lemonado.io/integrations/google-tag-manager · https://lemonado.io/llms.txt
FAQ

Frequently Asked Questions

Yes, through Lemonado. Connect your GTM account and container in Lemonado, add Lemonado in ~/.codex/config.toml, and Codex can check tags against consent with your live data.

No, Google doesn't run one. Community servers exist, and most can edit and publish your container, so check what you grant them. Lemonado gives Codex read-only access to your containers, next to GA4 and your ad platforms.

Run codex mcp list. If lemonado shows as not logged in, run codex mcp login lemonado again. In Lemonado, check that Google Tag Manager is connected and External tools is on for the company. If a container is missing, your Google user needs access to it in Tag Manager > Admin > User Management. Account access alone isn't always enough.

Yes, if both are connected in Lemonado. One connection reaches every source you allow, so you can ask things like "Google Ads conversions fell on Oct 18. Check which GTM version was published that week and what it changed."

MCP is included in Lemonado's paid plans and in the free trial, so you can try it before you pay.

See plans and pricing

Still have a question?

Shoot us an email at hello@lemonado.io.

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