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The sandbox lets you make real API calls against a demo account with live data connected, so you can see actual responses before building against your own account. It’s read-only: you can list and query, but not create or change anything.
The key below is a shared read-only sandbox key — safe to use publicly. Write calls (POST/PUT/DELETE) return 403. For write access, use a key from your own account (see Authentication).

Set up

The sandbox account has one demo client with Google Ads, Google Analytics 4, and Facebook Ads connected:

List the demo client

Query live data

Pull real Google Ads numbers for the demo client:
You’ll get back the data-query response shapedata.current rows plus data.currentSummary totals — with real values.

What you can’t do here

The sandbox key is read-only, so POST/PUT/DELETE calls return 403. To try the full create → connect → build flow, use your own account and follow the Quickstart.