Show HN: GTM MCP Server- Let AI Manage Your Google Tag Manager Containers(github.com)

  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.

 /s Thank you for your attention to this matter