Ga4 MCP Server

mcp-ga4

MCP server for Google Analytics 4 -- run reports, realtime data, custom dimensions, and property management via Claude.

Features

• 9 tools covering reporting, realtime data, custom dimensions/metrics, data streams, and feedback
• Two configuration modes: single-property (env vars) and multi-client (config.json)
• Supports both service account and OAuth credentials
• Relative date support (today, yesterday, 7daysAgo, 30daysAgo, 90daysAgo)
• Built on official Google SDKs with resilience patterns

Installation

npm install mcp-ga4

Or clone the repository:

git clone https://github.com/mharnett/mcp-ga4.git
cd mcp-ga4
npm install
npm run build

Configuration

Security: Never share your .mcp.json file or commit it to git -- it may contain API credentials. Add .mcp.json to your .gitignore.

Mode 1: Single Property (env vars)

Set environment variables to connect to a single GA4 property:

GA4_PROPERTY_ID=123456789
GOOGLE_APPLICATION_CREDENTIALS=/path/to/service-account.json

Mode 2: Multi-Client (config.json)

Create a config.json in the project root to map multiple GA4 properties to project directories. The server auto-detects which property to use based on the caller's working directory.

{
  "credentials_file": "/path/to/oauth-credentials.json",
  "clients": {
    "client-a": {
      "name": "Client A",
      "folder": "/path/to/client-a/project",
      "property_id": "123456789"
    },
    "client-b": {
      "name": "Client B",
      "folder": "/path/to/client-b/project",
      "property_id": "987654321"
    }
  }
}

Usage

Claude Code (.mcp.json)

Single-property mode:

{
  "mcpServers": {
    "ga4": {
      "command": "npx",
      "args": ["mcp-ga4"],
      "env": {
        "GA4_PROPERTY_ID": "123456789",
        "GOOGLE_APPLICATION_CREDENTIALS": "/path/to/credentials.json"
      }
    }
  }
}

Multi-client mode:

{
  "mcpServers": {
    "ga4": {
      "command": "node",
      "args": ["/path/to/mcp-ga4/dist/index.js"]
    }
  }
}

Claude Desktop: Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows).

Common Query Patterns

Top pages: dimensions=pagePath, metrics=screenPageViews, order_by=screenPageViews

Traffic sources: dimensions=sessionSource,sessionMedium, metrics=sessions,totalUsers

Daily trend: dimensions=date, metrics=sessions,totalUsers

Campaign performance: dimensions=sessionCampaignName, metrics=sessions,conversions

Device breakdown: dimensions=deviceCategory, metrics=sessions,totalUsers

Tools

Date Formats

Use YYYY-MM-DD for absolute dates, or these relative shortcuts:

• today
• yesterday
• 7daysAgo
• 30daysAgo
• 90daysAgo

Common Dimensions and Metrics

Dimensions: date, dateHour, eventName, pagePath, pageTitle, sessionSource, sessionMedium, sessionCampaignName, country, city, deviceCategory, browser, operatingSystem, landingPage, pageReferrer, newVsReturning, firstUserSource, firstUserMedium, firstUserCampaignName

Metrics: sessions, totalUsers, newUsers, activeUsers, screenPageViews, eventCount, conversions, engagedSessions, engagementRate, averageSessionDuration, bounceRate, sessionsPerUser, screenPageViewsPerSession, userEngagementDuration

Data Freshness

• Standard reports: 24-48 hour delay
• Realtime reports: last 30 minutes only

Architecture

Built on:

• @google-analytics/data -- GA4 Data API for reports
• @google-analytics/admin -- GA4 Admin API for property management
• cockatiel -- resilience (retry, circuit breaker)
• pino -- structured logging

License

MIT

Author

Built by Mark Harnett / drak-marketing