Which Cloud service allows on-premise resources to reach Google APIs without an external IP?

Private Google Access enables on-premise resources within a Virtual Private Cloud (VPC) network to access Google APIs and services without needing an external IP address. This service is essential for maintaining privacy and security while allowing seamless connectivity to Google Cloud resources. When Private Google Access is enabled, instances in a VPC can reach Google services over the Google network, ensuring that their traffic does not traverse the public internet. This creates a more secure environment by reducing exposure to potential threats.

In contrast, Cloud VPN and Interconnect provide connectivity between on-premise resources and Google Cloud, but they do not specifically facilitate access to Google APIs without an external IP. Cloud Router is used to manage dynamic routing between Google Cloud and on-premises networks but does not directly provide access to Google APIs in the way Private Google Access does.