I can't guarantee I'll remember to keep this text file up to date as I improve it / fix bugs, but you can find the source here. Yes, it's PHP. You must schedule it to run regularly with cron, I use every minute. The caching bit is important as to not hammer the servers, which can quickly take its toll on server performance, and I would hope that not too many people go out and run their own copy of this script for that reason. Unless you need to customize it (which, it's an API, not really much to customize... just use it ), I would very much suggest using the cached version I provide here.