What is the Webmaster Tools API?
Google Webmaster Tools is Google’s free service for webmasters. See your site as Google sees it, find out any problems we had crawling your site, and share info with us that will help improve your site’s visibility in Google’s search results. Your client application can use the Webmaster Tools Data API to view sites in your Webmaster Tools account, add and remove sites, verify site ownership, and submit and delete Sitemaps.