In this post we want to demonstrate a new way to fulfill the requirement for API management in Cloud Run. Specifically we want to look at how the recently announced multi-container feature in Cloud Run enables a sidecar pattern that can be used by developers of Cloud Run services to add pre-packaged API management capabilities. This includes self-service developer onboarding in a developer portal, credential validation and quota enforcements. As an additional operational benefit the described solution also adds centralized analytics and metrics for APIs that are exposed via Cloud Run.