Overview
Google Analytics Data API (GA4) lets you query sessions, users, and conversion metrics to build custom dashboards or automate reports. Requires OAuth 2.0 with a service account.
Beginner Tip
Always use a GA4 property ID formatted as "properties/123456789" — Universal Analytics UA-* IDs will not work. Find your property ID in GA4 Admin under Property Settings.
Available Data
Example Response
{
"status": "success",
"data": {
"result": "Data from Google Analytics",
"description": "Collect, configure and analyze your data to reach the right audience",
"timestamp": "2025-01-15T10:00:00Z"
}
} Field Reference
dimensionHeaders Ordered list of dimension names corresponding to columns in each row. metricHeaders Ordered list of metric names and types corresponding to columns in each row. rows Each row contains dimensionValues and metricValues arrays matching the header order. rows[].dimensionValues[].value The string value for a dimension in this row (e.g. "United States"). rows[].metricValues[].value The metric value returned as a string — convert to a number in your code. rowCount Total number of rows in the full result before any row limits are applied. Implementation Example
const url = "https://developers.google.com/analytics/";
// Replace headers or query params with the values required by this API.
const response = await fetch(url, {
headers: {
"Authorization": "Bearer YOUR_API_KEY"
}
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
const data = await response.json();
console.log(data); What Can You Build?
Note: These code examples are AI-generated and unverified. Always refer to the official API documentation for accurate usage.
Common Errors & Troubleshooting
Matrix Score Breakdown
Partially tested on Apr 5, 2026
Technical Specifications
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