When they released Open Site Explorer, SEOmoz gave SEOs a powerful, free tool upon which many now rely. But did you know that all SEOmoz members have access to the just-as-free and perhaps powerfuller Linkscape API? This API uses the same data set as OSE, but you can use it to make large numbers of queries which might be cumbersome with OSE.
Linkscape is a web based API. Your query looks like a URL, and requesting that URL will return the data you need. We mention the API from time to time on the Distilled blog. Will Critchlow wrote a post a while back with a bash script that accessed Linkscape data. What I want to do here, though, is just take you from zero to fifty-five in a few easy steps.
There are, of course, many query types to choose from.