Google Tag Manager MCP server

Google Tag Manager MCP

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A1 Google Tag Manager MCP lets an AI app inspect and manage Google Tag Manager containers in plain language. See what fires on a page, work with tags, triggers and variables in a draft workspace, then deliberately compile and publish a version when you are ready.

It connects to the Google Tag Manager API v2 through your Google account. The difference from asking an AI to guess a GTM setup is that it works with the actual container, workspace and version you choose.

• 25 tools. 10 operations only read GTM data; 4 create drafts or change built-in variables; 5 can alter, delete, compile or publish live configuration.
• Connects from the conversation. Say "connect Google Tag Manager": the server walks you through the OAuth client, catches Google's redirect on 127.0.0.1 with PKCE and keeps the tokens itself — no config files, no restart.
• Draft first. Tags, triggers and variables are created in a workspace. Publishing is a separate, explicitly destructive operation.
• Quota-aware. GTM permits 0.25 requests per second per project; the server spaces requests by at least 4.2 seconds instead of overwhelming the API.
• Your Google access. The server uses your OAuth credentials and requests only the Tag Manager scopes needed for reading, editing, versioning and publishing.

Start with a read-only question:

Which tags in my containers fire on the page-view trigger?

Connect the server · Explore use cases · Open technical documentation

See it work in a minute

You: List my GTM containers and show which tags fire on page view.

Assistant: Lists the containers, their workspaces, relevant triggers and the tags attached to them. Nothing changes.

You: In the Default Workspace of GTM-ABC123, prepare a GA4 configuration tag for measurement ID G-XXXXXXX on all pages.

Assistant: Shows the workspace, proposed tag and trigger configuration, then asks for confirmation before creating the draft.

You: Confirm the draft.

Assistant: Creates the tag in the workspace. It does not publish the container; compiling and publishing a version remains a separate step.

Contents

• Quick start
• What you can ask it to do
• How GTM changes are connected
• What can change
• Getting access
• Configuration
• Data and telemetry
• Limits and background work
• Technical documentation
• Support

Quick start

You need Node.js 20+ and a Google account. Credentials are not required at install time — the server connects from the conversation.

1. Add the server to your AI app.
2. Say "connect Google Tag Manager": the assistant walks you through creating the OAuth client and approving access without editing config files.
3. Start with the read-only question above.

Codex

In the app:

1. Open Settings → MCP servers.
2. Select Add server.
3. Choose STDIO, then enter npx -y mcp-google-tagmanager@latest and the three environment variables below.

Shortened. The full README is on GitHub.