Working of a page-ranking application?

whenigivein's Avatar, Join Date: Jan 2012
Newbie Member
Hello everyone,

I came across some page-ranking web-app that would generate the current ranking of a website. I was wondering from where do they get the data for ranking a page? Do they somehow access the google databases and check their indexed values?
shabbir's Avatar, Join Date: Jul 2004
Go4Expert Founder
There are Google APIs to get such information.