Google Tag Manager MCP Server

Built by Growthers.io — Data-driven growth agency.

An open-source MCP (Model Context Protocol) server that gives AI agents full access to the Google Tag Manager API v2.

Works with Claude Code, Claude Desktop, Cursor, and any MCP-compatible client. Manage accounts, containers, workspaces, tags, triggers, variables, consent mode, and container versions — all from your AI assistant.

No external services required. Runs locally on your machine using your own Google credentials.

Prerequisites

• Python 3.10+
• pipx (recommended) or pip
• A Google Cloud project with the Tag Manager API enabled
• gcloud CLI for credential setup

Setup

1. Enable the Tag Manager API

1. Go to Google Cloud Console
2. Select or create a project
3. Go to APIs & Services > Enable APIs
4. Search for Tag Manager API and enable it

2. Authenticate

gcloud auth application-default login \
  --scopes="https://www.googleapis.com/auth/cloud-platform,https://www.googleapis.com/auth/tagmanager.readonly,https://www.googleapis.com/auth/tagmanager.edit.containers,https://www.googleapis.com/auth/tagmanager.edit.containerversions"

This creates a credentials file at ~/.config/gcloud/application_default_credentials.json.

Tip: If the default gcloud client blocks some scopes, create a custom OAuth Client ID in your Google Cloud project (APIs & Services > Credentials > Create OAuth Client > Desktop App), then use --client-id-file=<path-to-client-secret.json> with the command above.

3. Install

Option A: With pipx (recommended)

pipx install git+https://github.com/CarC96/google-tag-manager-mcp.git

Option B: From source

git clone https://github.com/CarC96/google-tag-manager-mcp.git
cd google-tag-manager-mcp
pip install .

4. Configure your MCP client

Add to your MCP client configuration (e.g. ~/.claude.json for Claude Code):

{
  "mcpServers": {
    "gtm-mcp": {
      "type": "stdio",
      "command": "pipx",
      "args": ["run", "gtm-mcp"],
      "env": {
        "GOOGLE_APPLICATION_CREDENTIALS": "<path-to>/application_default_credentials.json"
      }
    }
  }
}

Replace <path-to> with the actual path to your credentials file (typically ~/.config/gcloud/application_default_credentials.json).

How it works

Despite the name "server", this runs as a local process on your machine. Your MCP client launches it as a subprocess and communicates via stdin/stdout. No network ports are opened, no cloud hosting is needed — it's essentially a plugin.

MCP Client (Claude Code, etc.)  ←— stdin/stdout —→  gtm-mcp (local process)  ——→  Google Tag Manager API

Available Tools (30)

Accounts

Tool	Description
list_accounts	List all GTM accounts
get_account	Get account details
list_user_permissions	List permissions for an account

Containers

Tool	Description
list_containers	List all containers in an account
get_container	Get container details
get_container_snippet	Get the install snippet for a website

Workspaces

Tool	Description
list_workspaces	List workspaces in a container
get_workspace	Get workspace details
get_workspace_status	Check for conflicts and modified entities
create_workspace	Create a new workspace

Tags

Tool	Description
list_tags	List all tags
get_tag	Get tag details
create_tag	Create a new tag
update_tag	Update a tag
delete_tag	Delete a tag

Triggers

Tool	Description
list_triggers	List all triggers
get_trigger	Get trigger details
create_trigger	Create a new trigger
update_trigger	Update a trigger
delete_trigger	Delete a trigger

Variables

Tool	Description
list_variables	List all variables
get_variable	Get variable details
create_variable	Create a new variable
update_variable	Update a variable
delete_variable	Delete a variable

Built-in Variables

Tool	Description
list_built_in_variables	List all enabled built-in variables

Versions

Tool	Description
list_version_headers	List all version headers (summary)
get_live_version	Get the published version with all entities (great for audits)
get_version	Get a specific version by ID

Use Cases

• Consent Mode Audits — Analyze all tags and their consent settings in seconds
• Bulk Tag Management — Create, update, or delete tags/triggers/variables programmatically
• GDPR Compliance — Verify consent configurations across all tags
• Container Migrations — Read and replicate configurations across containers
• Documentation — Auto-generate reports of your GTM setup

About Growthers.io

Growthers.io is a data-driven growth agency specializing in analytics, tracking infrastructure, and marketing automation. We build tools that make digital marketing more efficient and compliant.

License

Apache-2.0