Google recently announced a beta version of its new App Engine firewall. In addition to the security features inherent within App Engine, the App Engine firewall allows developers to block and permit users based on IP address and geography. Developers simply create rules and prioritize the rules.
Google has long fielded complaints of sign-in requirements associated with Google Play Games. The Google+ requirement and multiple sign-ins required for multiple games has been a hotbed of frustration. Google announced the end of both requirements as part of a Google Play Games API model change.
Whether you're rolling your own soup to nuts API management solution, or your existing API management technology is missing some of the basics when it comes to API endpoint security, Cloudflare's recently released Traffic Control may have the right combination of features to fill in the gaps.