It seems Google have ceased access to their PageRank API from 06 Oct 2011. Though in google toolbar it showing page rank. According to Google's 10-K 2009 filing : "The first version of the PageRank technology was created while Larry and Sergey attended Stanford University, which owns a patent to PageRank. The PageRank patent expires in 2017. We hold a perpetual license to this patent. In October 2003, we extended our exclusivity period to this patent through 2011, at which point our license will become non-exclusive." It may be the big move for Google and other search industries. Please let me know whether you are feeling same.