Microsoft Spotlight for GNU/Linux distros

Just set your display manager's login greeter's background to use the image set in this script's WALLPAPER variable (or vice versa) and put the script in the startup :)

E.g.: For lightdm you would have to edit /etc/lightdm/lightdm-gtk-greeter.conf to use /opt/login-background.jpg

About the MS Spotlight API

The Spotlight API is located on the following endpoint:

https://arc.msn.com/v3/Delivery/Cache?pid=209567&fmt=json&rafb=0&ua=WindowsShellClient%2F0&disphorzres=9999&dispvertres=9999&lo=80217&pl=en-US&lc=en-US&ctry=us&time=2017-12-31T23:59:59Z

Where the expected arguments are:

• pid : Purpose currently unknown
• fmt : Output format, e.g. json
• rafb : Purpose currently unknown
• ua : Client user agent string
• disphorzres: Screen width in pixels
• dispvertres: Screen height in pixels
• lo : Purpose currently uknown
• pl : Locale, e.g. en-US
• lc : Language, e.g. en-US
• ctry : Country, e.g. us
• time : Time, e.g. 2017-12-31T23:59:59Z

The JSON response contains details about 6-7 images including image url, title, sha256, ads, etc.

Spotlight API URL was originally found in this file, thanks to the author for their findings!