Link Popularity Checker Tool?

[Bermy]

Hi everyone,

I'm a newbie and I just start to build PHP script. I just build a new popularity link checker with PHP and it work fine. This tool check for Alexa Ranking, AlltheWeb, Altavista, DMOZ, Google/AOL, HotBot, MSN, Yahoo and Zeal. My question is: Do I need to incorporate the Google Web APIs in my script. I use this line in my PhP script to check Google:

linkcheck("http://www.google.com/search?hl=en&lr=&ie=UTF-8&q=link%3A".$domain, 'google');

If I do not add API, what gone happen next? Does it worthless to add SEO tools in a website. Will these scripts attract more traffic?

Many thanks to all of you for helping me!