How to check spammyness of a link/url

I know that most spams are related with one or more links, so I am wondering if there is any web service which can check the spam-weight/spammyness of a URL. Similar to how Akismet can check the spammyness of text content.

p.s. - I searched in google and couldn't find anything satisfactory :)

There are a number of different URI DNS-based Blackhole (or DNSBL) services available to the public for low volume lookups. Two of the most well-known are SURBL and URIBL. PhishTank (run by OpenDNS) is also worth a look as many of the URLs are categorized and classified along with being listed.