Do you know the date when google launched that API: https://developers.google.com/earth/
The Google Earth API was released at the Google I/O on May 28, 2008. Here's an excerpt from the article announcing the release:
According to this announcement at the Google Blog, it was launched on June 29, 2005.
June 29, 2005 Posted by Bret Taylor, Google Maps Product Manager
If you like Google Maps, but think you could do something better, now's your chance. Check out the Google Maps API, which lets web developers put Google Maps on their own sites, just like housingmaps.com and chicagocrime.org. You can also reach out to other API developers and the Google Maps team in the API discussion group.
According to Wikipedia, it was launched on February 8, 2005.