[dpkirchner]

Are you sure you're not thinking of billing alerts? AFAIK there is still no way to set spending limits at GCP.

[bilekas]

I'll admit it's a bit obscure But there is info here.

https://docs.cloud.google.com/apis/docs/capping-api-usage

Or you can do it programmatically.

https://docs.cloud.google.com/billing/docs/how-to/disable-bi...