Pull current-session / active-user data from the GA4 Realtime endpoint —
a separate API surface from runReport with different metrics, dimensions, and
freshness guarantees (~30 min rolling window instead of T-48h). Trigger with
"GA4 realtime", "active users right now", "GA4 current sessions",
"who's on my site now".
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SKILL.md
Quellanweisungen · Schreibgeschützte Vorschau
name
ga4-realtime-api
description
Pull current-session / active-user data from the GA4 Realtime endpoint —
a separate API surface from runReport with different metrics, dimensions, and
freshness guarantees (~30 min rolling window instead of T-48h). Trigger with
"GA4 realtime", "active users right now", "GA4 current sessions",
"who's on my site now".
The Realtime API is GA4's "what's happening right now" endpoint. Different from runReport:
runReport (Data API)
runRealtimeReport (Realtime)
Freshness
~24-48h lag, stable
Last ~30 min, rolling
Window
Any date range
Implicit — last 30 min
Metrics
~50 supported
~10 supported (subset)
Dimensions
~150 supported
~15 supported (subset)
Quota
Per-property daily
Separate Realtime quota
Use case
Reports, dashboards, trend analysis
Live dashboards, monitoring, "are we down?"
Don't try to use runReport for now-data — its freshest data point is yesterday. Use runRealtimeReport.
Prerequisites
A GA4 Data API credential with access to the target property, configured through ga4-auth-setup.
Python with google-analytics-data installed.
A numeric property ID; realtime data is inherently a rolling, roughly 30-minute view and is not a replacement for historical reporting.
Instructions
Examples
Minimum viable call
from google.analytics.data_v1beta import BetaAnalyticsDataClient
from google.analytics.data_v1beta.types import (
RunRealtimeReportRequest, Metric, Dimension,
)
client = BetaAnalyticsDataClient()
resp = client.run_realtime_report(RunRealtimeReportRequest(
property="properties/123456789",
metrics=[Metric(name="activeUsers")],
))
# Single-row response when there are no dimensions
total = int(resp.rows[0].metric_values[0].value) if resp.rows else0
()
print
f"Active users right now: {total}"
No date_ranges block — the implicit window is the last 30 min. Adding one will error.
Realtime metrics (the full list)
Metric
What it counts
activeUsers
Unique users in the last 30 min
screenPageViews
Pageviews + screenviews in the last 30 min
eventCount
Total events in the last 30 min
conversions
Conversion events in the last 30 min
keyEvents
Key events (post-2024 rename of conversions)
Custom-event aggregates (e.g. purchase_revenue) are NOT in the Realtime API. If you need realtime revenue, derive it from eventCount filtered to eventName=="purchase" plus your average AOV.
Realtime dimensions (the full list)
Dimension
Use
country, city
Geo of currently-active users
deviceCategory
desktop / mobile / tablet split
unifiedScreenName / unifiedScreenClass
App screen / web title
eventName
Event-type breakdown
streamId, streamName
When property has multiple data streams (web + iOS + Android)
platform
web / ios / android
appVersion, audienceName, audienceId
When defined in the property
That's the full list. ~15 dims total. Compare to runReport's ~150.
Common realtime queries
"How many people are on my site right now?"
resp = client.run_realtime_report(RunRealtimeReportRequest(
property="properties/123456789",
metrics=[Metric(name="activeUsers")],
))
print(int(resp.rows[0].metric_values[0].value) if resp.rows else0)
"Active users by country, right now"
resp = client.run_realtime_report(RunRealtimeReportRequest(
property="properties/123456789",
metrics=[Metric(name="activeUsers")],
dimensions=[Dimension(name="country")],
limit=20,
))
for r in resp.rows:
print(f"{r.dimension_values[0].value:25s}{r.metric_values[0].value}")
Realtime doesn't expose pagePath directly. Use unifiedScreenName (the page title) or unifiedScreenClass. To get path-level granularity in realtime, push a custom event with the path as a parameter, then query by eventName + that custom dimension.
Filters
Same shape as runReport — FilterExpression / Filter blocks. Realtime supports dimension_filter and metric_filter but not the full set of dimensions / metrics; check the Realtime API schema before writing complex filters.
Quotas — different from Data API
Realtime has its own quota bucket. Defaults (2026):
5,000 requests per project per day
250 requests per property per day
60 requests per minute per property
For a live dashboard polling every 10s: that's 6 RPM, well within limits. For a hot incident where you want minute-by-minute data, you can poll up to 60x/min per property.
Don't poll faster than 30s
The data window is the last 30 min. Polling faster than ~30s wastes quota without meaningful resolution change. For most "live" use cases, 60s polling is plenty.
Output
The API returns the current rolling-window aggregate or a bounded set of dimension rows, such as active users by country or event count by name. A valid empty rows list means no currently reportable activity, so callers should render zero rather than treat it as a transport failure.
Error Handling
Issue
Why
activeUsers doesn't match the GA4 web UI's "Realtime" overview
The UI uses a slightly different window (~5 min default) and may include in-flight events not yet reportable via API. Web UI > API for instant-incidents.
Empty rows on a busy site
Property may be using a different stream you didn't filter for. Add Dimension(name="streamId") to see splits.
400 INVALID_ARGUMENT: Realtime reports do not support dimension X
Using a Data-API-only dimension (e.g. pagePath, sessionSource). Use a Realtime dimension.
Latency between front-end event and Realtime visibility
~10-30 seconds is normal. If >2 minutes, check the GA4 DebugView for event delivery issues.
Resources
ga4-auth-setup — prerequisite
ga4-data-api-query — for any window longer than 30 min
ga4-common-reports — for canonical reports (DAU/MAU/retention) which are NOT realtime-able
