GA4 MCP connector for Claude and ChatGPT

What you can ask

• “Active users and sessions by day for the last 28 days, by platform.”
• “How many users reached the paywall event this week, and how many started a trial?”
• “Top landing pages by sessions last month, by country.”
• “Who is on the site or in the app right now?” Realtime, the last 30 minutes.
• “Which custom events and user properties does this property have?” Metadata, including your custom dimensions and metrics.

Hosted, not a local server

Unlike running a local GA4 MCP server, there is no package to install, no Google Cloud project to create and no credentials file on your machine. You authorize Google once on Connections; the token is stored encrypted on the server, which calls the GA4 Data and Admin APIs for you.

The same sign-in covers Google Ads and Search Console.

How to connect

1. Install Marketing Kit: in Claude, the plugin from claude.ai/customize/plugins; in ChatGPT, the connector in Developer mode.
2. On Connections press Authorize with Google, pick the account that sees your GA4 property and keep every box checked.
3. Ask in a new chat. A good first message: “check Marketing Kit status”.

What it reads

• Scope analytics.readonly: reports, realtime and metadata. It cannot change properties, settings or users.
• You see the accounts and properties your Google account can see; Viewer access is enough.
• Answers say when GA4 applied sampling or thresholds.
• Results too large for the chat come as a CSV or JSON download link, valid for 24 hours and only for you.

Limits

• Realtime has its own GA4 quota, separate from regular reports.
• If Google shows “Google hasn’t verified this app”, Google’s review of the Marketing Kit app is still pending: press Advanced → Go to marketing-kit.app → Continue.