API for Sales Prospecting
I have a lot of friends that work in sales and spend an awful lot of time (manually) trying to find new sales leads. There are a lot of sources out there (LinkedIn, Hoovers, InfoUSA, etc. ) which allow you to use a web browser for searching through their database. Others open up access to their data by way of an webservice API.
The Clearbit prospect API allows you to find people and bring back demographics as well as email address. The video demonstrates two examples where I of the Propector and Autocomplete Clearbit APIs.