Cannot Find Google APIs for Android SDK

This happened to me.

The simple fix was to update currently installed packages, which in turn updated the SDK Manager app, then after restarting, every appeared including the USB drivers.

Apparently, if the SD Manager is outdated, then you won't be able to install important thing like the USB driver.

I encountered the same problem

Go here to manually download the Google APIs. For example, I use GoogleAPI level 8, so I download the package here

After downloading just extract the zip file to "C:\Program Files (x86)\Android\android-sdk\add-ons" and rename the directory to "google_apis-8" instead of "google_apis-8_r02".