Ratebeer.com is member driven beer rating database that offers detailed profiles on beer and breweries around the world. The JSON API allows users to retrieve and post information to the site, along with some other perks. Users can search for bars and beer stores by location, get a sample list of beers offered at a location, retrieve beer scores and info on any beer in the ratebeer database, and search by UPC code, brewer, season, style, etc. The API also allows users to check in to a place and "tick" a beer as consumed for future reference.
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There are no mashups, developers or code associated with this API yet.
As of 11/21/2012, the page at http://www.ratebeer.com/json/ratebeer-api.asp lists the RateBeer API as being unavailable.