GA4 UTM Performance - Private UTM reporting via the GA4 Data API.

GA4 UTM Performance

Access

Stored in localStorage on this device.

Store multiple GA4 properties and switch quickly.

Server env: GA4_ADMIN_TOKEN, GA4_SERVICE_ACCOUNT_JSON_B64, and (optionally) GA4_PROPERTY_ID.

Scope

Tip: GA4 can take time to attribute new campaigns. If you’re not seeing results, try a wider date range.

Filters

Applies to the URL report (filters pageLocation). Insights use GA4 session traffic-source dimensions.

UTM URL Report

Groups are created client-side by parsing pageLocation.

Explore

These are GA4 Data API dimension names (examples: country, deviceCategory, sessionSource).

Tip: choose fewer metrics if GA4 rejects a combination.