SEO - How to programmatically check if a website has been Banned by Google

if your website links to another site that has been blacklisted by Google this is bad for your ranking

Sites like onlinealley helps you to know if there're problem开发者_开发百科s with a website you are linking to.

Does any Google API Exist .. or how are websites like this checking if a url is banned?

Are they checking the 'PageRank value' or something else?

Thanks

I like the nofollow suggestion. Its what SO does. Take a look at the page source.

You could also maybe do a 'site:PLACE_URL_HERE' lookup on Google to see if it actually returns any pages.

Also have you looked at the Google Safe Browsing API? Looks like that might be what your after.

A banned page has no-cache.

Checking cache is good advice but Banned site might have cache for awhile after the ban.

Cross examine data like

• PR score (if banned PR=0)
• Results for site:domain.com Google search (if banned nothing will appear)
• Check cache (if banned no cache will be available)

If 2 or more provide positive indication of ban, then you've been banned. (unless it`s a new, yet to be, indexed domain)

Also you should sign up in WMT (Web Master Tools) and if you get banned you might receive this notification: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=35665

Hope this helps.