As the application will perform mass-searching for all uploaded keywords, it will likely blocked by Google. There was no workaround implemented for that issue yet.
Some of the simple solutions include
Rotating the user agent used in each request to simulate that each request come from difference devices
A a break between each request: if using background jobs with queuing system, it is possible to define the delayed jobs
Using a rotated proxy to change the source IPs (there are even free solution, e.g. https://proxyscrape.com/)
Issue
As the application will perform mass-searching for all uploaded keywords, it will likely blocked by Google. There was no workaround implemented for that issue yet. Some of the simple solutions include