If you've been waiting patiently to get your grubby hands on Android Pay, it looks like your time is coming. While it's not exactly functional quite yet, the latest version of Google Play Services — version 8.1 — includes most of the Android Pay infrastructure baked in. You can launch a lot of the functionality, but as of this writing, setting up your credit cards is going to fail before you get a chance to use them...

Google Play Services v8.1 Begins Rolling Out To Prepare For Android Pay, Changes Variant Naming Scheme For Lollipop Devices, And More [APK Teardown + Download] 2015-08-31 14-16-40

There isn't anything shocking to be seen here, but it is notable that Android Pay requires that you use a secure password-protected lock screen in order to function. Additionally, you have to approve the service to be a device admin in order to "safely use Android Pay". Additionally, you can head over to the Tap & Pay screen and find that Android Pay is sitting an as option right next to Google Wallet

You can grab the latest version of Google Play Services over at APKMirror, and be sure to check out the below video of Android Pay in (partial) action, via Android Police: