Reply To: Utilizing Google Tag Manager's REST APIs to Generate GA4 Tags

[Liam]

I’m sorry to hear about the issues you’ve encountered while trying to create GA4 tags through the Google Tag Manager REST APIs. It’s unclear why you’re receiving errors suggesting the vendorTemplate parameter is causing issues; especially when you’re noting it isn’t specified as a necessary attribute in the official API documentation. This suggests there might be a discrepancy between the API’s actual requirements and its outlined documentation.

That being said, Google Analytics 4 (GA4) is a newer version of Google Analytics and Google might not yet have fully integrated its APIs (like the Tag API) to seamlessly support GA4. While the manual approach might seem cumbersome, it might be the most reliable way to make the transition at this point in time. However, I’d recommend reaching out to Google Support directly or posting this question on a Google Developer forum for a more definite answer from officials or fellow developers who might’ve faced and solved this exact issue.