Reads from s3 via an s3 endpoint inside a vpc to an interface inside of that vpc is not billed.

S3 GET operations are billed anyway.

Traffic may be free, but not the operations.

Ok, but to be clear you said all outgoing traffic is charged. The API call price is something else, it's not part of the outgoing traffic.

Yes, and stand by it: > All outgoing traffic from AWS is charged no matter what.

Your example with VPC endpoints does not leave AWS.

Sorry for the confusion you probably thought about outgoing from S3, but I mean outgoing from AWS.

S3 GET requests have negligible cost, at $0.0004/1000 requests. Upload requests are $0.005/1000, which is also negligible.

I object, we once paid $40k for that "negligible cost".