Get URL metrics from SeoMoz http://apiwiki.seomoz.org/w/page/13991153/URL%20Metrics%20API
Feel free to contribute!
use SeoMoz;
$accessId = 'xxx';
$secretKey = 'yyy';
$seoMoz = new SeoMoz($accessId, $secretKey);
$seoMozData = $seoMoz->getSeoMozData('www.github.com');
echo $seoMozData->getDomainAuthority();