Search engine that allows results to be scraped?

Since site scr开发者_如何学运维aping Google, Bing, etc. is against their terms of service I was wondering if there is any search engine that allows results to be scraped?

Why scrape? Why not use the supported APIs?

http://code.google.com/apis/customsearch/v1/overview.html

http://www.bing.com/developers

http://developer.yahoo.com/everything.html

You might be actually looking for Google JSON Search API: it allows you to legitimately search Google from your program, and is easier to use than screen-scraping.