In their conclusion, Mayr and Tosques reported a limit of 10,000 requests per day. Google only allows 1000, so I emailed Mayr to see why they reported 10,000. He replied that Google would give researchers more queries, but when I emailed api-support@google.com requesting a bump up, they replied with this:
Due to overwhelming demand, we are no longer accepting requests for additional queries or for commercial use permission.So researchers are in a quandary: use Google’s public web interface to perform searches which frequently (in my experience) leads to being blacklisted for hours at a time (even when less than 1000 daily queries are being made), or use the buggy (502 errors are common) API with only 1000 daily query limit which returns very different results than those obtained through the web interface.
Inspired by this dilemma, I have decided to put the APIs from Google, MSN, and Yahoo to the test. I am running a series of experiments comparing what the APIs return to what the web interfaces return. I’m hoping this will result in something that will give researchers a little more information on how to go about using search engines in their experiments and what to expect when using the APIs. Now if I can just find a free server that I can use to make requests for a few months…
you should contact these folks:
ReplyDeletehttp://jaunter.com/
http://properspell.com/
they may be able to help you get a contact