Do I have to ask for permission from search engine companies in order to use the MetaSearch?
No. It is not against the law for an individual or company to use the results of an engine as long as the complete search engine page is not duplicated, which is not the case with our MetaSearch script.
and so far from what I have seen there has been no problem what so ever with google, they are not blocking us and the site has been up since 1999.