Cortera API

From their site: With Cortera CONNECT™, you can obtain insights about your customers, prospects or any other set of companies directly from the web. You can select from a wide array of elements to append to your portfolio of businesses. Cortera's suite of products gives you instant access to cutting edge information that you need to drive revenue and stay one step ahead of your competition. Our fresh perspective on business information allows you to pay only for the information that you need, when you need it - nothing more, nothing less.