How to Feth HTML Data with Xpath?

I would like to retrieve data from html pages using xpath. With Google Spreadsheets this is possible using this kind of code:

=importXML("http://www.google.com/search?q=live", "//a[@class='l']/@href")

The problem with Google's service is their limitation of external calls.

I've read Zoho's documentation about retrieving external data, however I don't quite get this. It looks like one can only fetch xml files, not html pages?

Is there a solution to this? If it's not so easy, I'm willing to pay a bit for it.