We are rolling out a new Explorer Access  level access tier for Google Ads API over the next couple of weeks. This will allow new developers signing up for Google Ads API  to gain immediate access to production accounts, no longer limited to test accounts. Here’s how it will work:
Most new developers who sign for the Google Ads API will immediately be given Explorer Access  level upon completing onboarding steps.
 Explorer Access  level will give developers the ability to work with live serving accounts immediately.
To limit abuse, developer tokens with Explorer Access  will have some restrictions on functionality , such as creating new advertiser accounts and keyword planning.
 Explorer Access  will allow 2880 operations/day.
Developers can apply for Basic Access or Standard Access levels  to increase the daily operation limits and remove the restrictions on functionality.  
Existing developers are unaffected by this change. For example, those with Test Account Access, Basic Access and Standard Access levels 
In the future, the Google Ads API team will continue to streamline the onboarding process with additional improvements, so stay tuned.
If you have any questions or want to discuss this post, please reach out to us on our “Google Advertising and Measurement Community” Discord server .  
Anash P. Oommen , Google Ads API Team