Try it now (no install needed):
- Claude.ai: Settings → Connectors → Add https://mcp.gtmeditor.com
- Claude Code: claude mcp add -t http gtm https://mcp.gtmeditor.com
- ChatGPT: Add MCP integration at platform.openai.com/apps with URL https://mcp.gtmeditor.com
It authenticates with your Google account via OAuth 2.1, so your credentials are never stored on the
server.
What you can do:
- "Create a GA4 event tag for form submissions"
- "Audit this container for issues and duplicates"
- "Set up ecommerce tracking for purchases"
- "Publish the changes we just made"
It supports all GTM entity types including server-side containers (clients, transformations). There
are 40+ tools covering full CRUD, versioning, publishing, built-in variable management, and
Community Template Gallery imports.
Some things I learned building this:
Google's API has undocumented behaviors that took a while to figure out. Transformation types
(tf_allow_params, tf_exclude_params, tf_augment_event) aren't documented anywhere — I discovered
them through trial and error. Each type uses different parameter table keys, and passing an unknown
type returns HTTP 500 instead of 400. The autoEventFilter field on click/form triggers is silently
dropped by the API (returns 200 OK but doesn't persist).
I also built a companion repo with LLM-optimized GTM API documentation
(https://github.com/paolobietolini/gtm-api-for-llms) — structured as an installable skill for Claude
Code and Codex, so the AI knows the correct parameter formats, validation rules, and workflow
patterns.
Built with Go, deployed as a single Docker container. The MCP protocol makes it work across Claude
and ChatGPT without any client-specific code.
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