Google Tag Manager

Manage Google Tag Manager containers, tags, triggers, variables, and versions via the GTM API v2. Use when the user wants to list, create, update, delete, or inspect GTM tags, triggers, variables, built-in variables, workspaces, or versions. Also use for publishing container versions, auditing GTM setups, creating conversion tags, setting up cross-domain tracking, or managing dataLayer events. Covers: "GTM", "Tag Manager", "container tag", "conversion tag", "trigger", "GTM variable", "publish GTM", "GTM workspace", "dataLayer", "Google Ads tag", "GA4 tag", "cross-domain tracking".

Google Tag Manager Skill

Interact with the GTM API v2 to manage containers, workspaces, tags, triggers, variables, and versions.

Authentication

The GTM API uses OAuth2 via a Google Cloud service account.

Setup

1. Enable Tag Manager API in Google Cloud Console
2. Create a service account with key (JSON)
3. Grant the service account access in GTM (Admin → User Management → add service account email)
4. Set env vars:
   • GOOGLE_APPLICATION_CREDENTIALS=/path/to/service-account.json
   • GTM_ACCOUNT_ID=123456
   • GTM_CONTAINER_ID=789012

Script

All operations use scripts/gtm.sh. Run without args to see usage:

bash

scripts/gtm.sh <command> [args...]

Commands

Command	Description
accounts	List all GTM accounts
containers [accountId]	List containers in account
workspaces	List workspaces in container
tags [workspaceId]	List tags in workspace (default: latest)
tag <tagId> [workspaceId]	Get a specific tag
create-tag <jsonFile> [workspaceId]	Create a tag from JSON
update-tag <tagId> <jsonFile> [workspaceId]	Update a tag
delete-tag <tagId> [workspaceId]	Delete a tag
triggers [workspaceId]	List triggers
trigger <triggerId> [workspaceId]	Get a specific trigger
create-trigger <jsonFile> [workspaceId]	Create a trigger from JSON
update-trigger <triggerId> <jsonFile> [workspaceId]	Update a trigger
delete-trigger <triggerId> [workspaceId]	Delete a trigger
variables [workspaceId]	List variables
variable <variableId> [workspaceId]	Get a specific variable
create-variable <jsonFile> [workspaceId]	Create a variable from JSON
update-variable <variableId> <jsonFile> [workspaceId]	Update a variable
delete-variable <variableId> [workspaceId]	Delete a variable
built-in-vars [workspaceId]	List enabled built-in variables
enable-built-in <type,...> [workspaceId]	Enable built-in variable(s)
versions	List container version headers
version <versionId>	Get a specific version
version-live	Get the live (published) version
create-version [workspaceId] [name] [notes]	Create version from workspace
publish <versionId>	Publish a container version

Workspace Resolution

Most commands accept an optional workspaceId. If omitted, the script auto-resolves to the Default Workspace (the first workspace returned by the API — typically "Default Workspace").

Common Recipes

Create a Google Ads Conversion Tag

See references/recipes.md for JSON templates for:

• Google Ads Conversion Tracking tag
• GA4 Event tag
• Custom Event trigger (dataLayer)
• Cross-domain tracking linker

Workflow: Add Tag → Create Version → Publish

bash

# 1. Create trigger
scripts/gtm.sh create-trigger trigger.json

# 2. Create tag referencing the trigger
scripts/gtm.sh create-tag tag.json

# 3. Create version from workspace
scripts/gtm.sh create-version "" "v1.2 - Added conversion tag"

# 4. Publish
scripts/gtm.sh publish <versionId>

API Reference

For full resource schemas and trigger types, see references/api-reference.md.