I've used many APIs on GCP then I found most of APIs are disabled by default for example:
Cloud Run API:
Google Container Registry API:
Cloud Build API:
Compute Engine API:
And some of APIs are enabled by default for example:
Cloud Storage:
Cloud SQL:
So, on GCP, are APIs basically disabled by default?
Yes, on GCP, APIs are basically disabled by default. There are more than 250 APIs on GCP
And, only these 14 APIs below are enabled by default: