How do I mock the Google Analytics Data API + Admin API locally?

Install stunt, add a one-service block to stunt.yaml (adapter: embedded:ga4-style), and run stunt up. You get a local, stateful stand-in for Google Analytics Data API + Admin API v1beta — 7 routes over rest — with no remote account, no network, and no bills.

Is the Google Analytics Data API + Admin API mock data synthetic?

Yes — entirely. The adapter returns generated data only; stunt's adapter lint rejects real-looking secrets and PII at build time. It simulates the shape and behavior of Google Analytics Data API + Admin API (routes, status codes, pagination, webhooks), never real records.

← all adapters

ga4-style

simulates Google Analytics Data API + Admin API v1beta

restadapter v0.1.07 routes

verification

SDKverified with google-api-go-client v0.293.0· surface 7 · not implemented 4 · differs 3

use it

# add to stunt.yaml
services:
  ga4:
    adapter: embedded:ga4-style

# then
$ stunt up

The embedded: source extracts this adapter from the binary — no git clone, fully offline.

how to mock the Google Analytics Data API + Admin API locally

Install stunt, paste the service block above into stunt.yaml, run stunt up — then point your client at localhost instead of Google Analytics Data API + Admin API. It works offline, keeps state across requests and restarts, and every response is synthetic: the route shapes, status codes, pagination, and webhook delivery follow the real Google Analytics Data API + Admin API v1beta surface — the data is fake, the behavior is real.

backing stores

tokensaccountspropertiesdatastreams

api surface (7)

generated from the adapter manifest — exactly what boots, nothing more · covers 16% of the real API's 66 routes (derived from sdk google-api-go-client @ v0.293.0)

7 routes

GET/v1beta/accounts

GET/v1beta/properties

GET/v1beta/properties/{property}/dataStreams

GET/v1admin/accounts

GET/v1admin/properties

GET/v1admin/properties/{property}/dataStreams

POST/v1beta/properties/{resource}

SDK-verified behaviors (7)

✓Admin Accounts.List returns the seeded account
✓Admin Properties.List filters by parent account
✓Admin DataStreams.List returns the property streams
✓Data runReport returns headers, rows, and rowCount
✓Data runReport limit pages rows deterministically
✓Data runRealtimeReport returns rows
✓Unknown dimension runReport -> googleapi 400

Not implemented (4)

No pivots, cohortSpec, metricAggregations, or keepEmptyRows in runReport
No runPivotReport, batchRunReports, getMetadata, or checkCompatibility
No Admin write ops: account/property/dataStream create, patch, delete
No googleAdsLinks, firebaseLinks, audiences, or conversionEvents

Differs from the real API (3)

Dimensions: date/country/deviceCategory only; metrics: sessions/activeUsers/screenPageViews
properties.list honors only the filter=parent:<account> form
Admin API served at both /v1admin (GA) and /v1beta (the shipped Go client's version); shapes shared

full scorecard →

want more of the Google Analytics Data API + Admin API surface? adapters are YAML + Starlark — the authoring guide covers adding routes, fixtures, and state machines. Open an issue for anything big first, or just file a PR — merged routes ship in the next release.