Welcome to the Q&A Forum

Hi Karen. Yes there was a recent update, please read about it here: http://moz.com/products/api/updates (that's the home of API update news btw).  And here's the Q&A post discussing the specifics as to why link numbers fluctuated: http://moz.com/community/q/have-questions-about-the-jan-27th-mozscape-index-update-get-answers-here. Enjoy!