Google Tag Manager MCP

Google Tag Manager MCP server for Claude Code, Cursor, Copilot and five more AI agents. Connect Google Tag Manager to Claude, Copilot, Cursor, Codex, Gemini, Windsurf, Continue.dev and Cline. One extension, 8 agents, no config files to edit.

Install. Sign in with Google. Ask your AI agent about Google Tag Manager.

Quick Start

Install from the VS Code Marketplace or Open VSX
Authenticate: the setup wizard appears on first launch
Ask your AI agent anything about Google Tag Manager

"List the tags in my main GTM container"
"Which triggers fire the GA4 config tag?"
"What changed in the live container version?"

Prerequisites

You need one of these (the wizard will guide you):

Method	Best For	What You Need
OAuth (recommended)	Personal Google accounts	A Google Cloud project with OAuth credentials
ADC	Developers with `gcloud` CLI	Run one terminal command
Service Account	Workspace admins and servers	A JSON key file

Go to Google Cloud Console
Create a project (or select an existing one)
Enable the Tag Manager API under APIs & Services > Library
Create OAuth credentials:
- Go to APIs & Services > Credentials
- Click Create Credentials > OAuth client ID
- Application type: Desktop app
- Copy the Client ID and Client Secret
Configure the OAuth consent screen (if prompted) and add yourself as a test user
In the extension wizard, select "OAuth" and paste your Client ID and Secret
A browser window opens: sign in with your Google account and authorize

Option B: Application Default Credentials

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,https://www.googleapis.com/auth/tagmanager.publish

Option C: Service Account Key

Create a service account in Google Cloud Console and give it access to your Google Tag Manager data
Download the JSON key file
In the extension wizard, select "Service Account" and pick the file

Available Tools (9)

Tool	What It Does	Example Prompt
`gtm_list_accounts`	List your GTM accounts	"Which GTM accounts can I see?"
`gtm_list_containers`	Containers and their GTM-XXXX IDs	"List the containers in my account"
`gtm_list_workspaces`	Workspaces in a container	"Which workspaces are open?"
`gtm_list_tags`	Tags with triggers and parameters	"Which tags fire on all pages?"
`gtm_list_triggers`	Triggers and their conditions	"Show the click triggers"
`gtm_list_variables`	User-defined and built-in variables	"Which variables read the data layer?"
`gtm_get_live_version`	What is published right now	"What is live in GTM-ABC123?"

GTM Admin (`gtm_admin`)

One tool, called with an action and its params.

Action	Needs `confirm: true`
`create_tag(workspace_path, name, type, parameters?, firing_trigger_ids?, blocking_trigger_ids?)`	No
`update_tag(tag_path, name?, parameters?, firing_trigger_ids?, blocking_trigger_ids?)`	No
`pause_tag(tag_path, paused?)`	No
`delete_tag(tag_path)`	Yes
`create_trigger(workspace_path, name, type, filters?, custom_event_filters?, auto_event_filters?)`	No
`create_variable(workspace_path, name, type, parameters?)`	No
`create_version(workspace_path, name?, notes?)`	No
`publish_version(version_path)`	Yes

Edits land in a workspace. Nothing reaches your site until publish_version, which needs confirm: true.

Safety

Actions that delete, remove, replace or publish need confirm: true in their params. Without it the server changes nothing and returns a warning, so your AI agent has to ask you and then call again with confirm: true.

Supported AI Agents

The extension auto-registers with every AI agent it detects:

Agent	How It Registers	Config File
VS Code Copilot	VS Code API (automatic)	--
Claude Code	`~/.claude.json`	JSON
Cursor	`~/.cursor/mcp.json`	JSON
OpenAI Codex	`~/.codex/config.toml`	TOML
Google Gemini	`~/.gemini/settings.json`	JSON
Windsurf	`~/.codeium/windsurf/mcp_config.json`	JSON
Continue.dev	`~/.continue/config.yaml`	YAML
Cline	VS Code globalStorage	JSON

You can toggle individual agents on/off in Settings > search googleTagManagerMcp.agents.

Settings

Setting	Default	Description
`googleTagManagerMcp.authMethod`	`"oauth"`	Auth method: oauth, adc, serviceAccount
`googleTagManagerMcp.agents.*`	`true`	Per-agent registration toggles
`googleTagManagerMcp.registrationScope`	`"global"`	Global or workspace registration
`googleTagManagerMcp.autoStart`	`true`	Auto-start server on VS Code launch
`googleTagManagerMcp.serverLogLevel`	`"info"`	Server log verbosity

Commands

Open the Command Palette (Cmd+Shift+P / Ctrl+Shift+P) and search for:

Command	What It Does
`Google Tag Manager MCP: Setup Authentication`	Run the setup wizard
`Google Tag Manager MCP: Register with AI Agents`	Re-register with all detected agents
`Google Tag Manager MCP: Show Status`	Show auth method and server state
`Google Tag Manager MCP: Restart MCP Server`	Restart the background MCP server
`Google Tag Manager MCP: Check Authentication Status`	Verify credentials are valid
`Google Tag Manager MCP: View Server Logs`	Open the output channel for debugging
`Google Tag Manager MCP: Remove from All Agents`	Clean up all agent registrations

Troubleshooting