GA4 - Google Analytics 4 Data API

Query GA4 properties for analytics data: page views, sessions, users, traffic sources, conversions, and more.

Setup (one-time)

1. Enable Google Analytics Data API: https://console.cloud.google.com/apis/library/analyticsdata.googleapis.com

2. Create OAuth credentials or use existing Google Cloud project

3. Set environment variables:

- `GA4_PROPERTY_ID` - Your GA4 property ID (numeric, e.g., "123456789")

- `GOOGLE_CLIENT_ID` - OAuth client ID

- `GOOGLE_CLIENT_SECRET` - OAuth client secret

- `GOOGLE_REFRESH_TOKEN` - OAuth refresh token (from initial auth flow)

Common Queries

Top Pages (by pageviews)

```bash

python3 scripts/ga4_query.py --metric screenPageViews --dimension pagePath --limit 30

```

Top Pages with Sessions & Users

```bash

python3 scripts/ga4_query.py --metrics screenPageViews,sessions,totalUsers --dimension pagePath --limit 20

```

Traffic Sources

```bash

python3 scripts/ga4_query.py --metric sessions --dimension sessionSource --limit 20

```

Landing Pages

```bash

python3 scripts/ga4_query.py --metric sessions --dimension landingPage --limit 30

```

Custom Date Range

```bash

python3 scripts/ga4_query.py --metric sessions --dimension pagePath --start 2026-01-01 --end 2026-01-15

```

Filter by Page Path

```bash

python3 scripts/ga4_query.py --metric screenPageViews --dimension pagePath --filter "pagePath=~/blog/"

```

Available Metrics

Common metrics: `screenPageViews`, `sessions`, `totalUsers`, `newUsers`, `activeUsers`, `bounceRate`, `averageSessionDuration`, `conversions`, `eventCount`

Available Dimensions

Common dimensions: `pagePath`, `pageTitle`, `landingPage`, `sessionSource`, `sessionMedium`, `sessionCampaignName`, `country`, `city`, `deviceCategory`, `browser`, `date`

Output Formats

Default: Table format

Add `--json` for JSON output

Add `--csv` for CSV output