foursquare offers merchants and other venue owners a free set of tools to help attract new customers and keep current ones coming back. The merchant platform lets users offer foursquare Specials â€“ mobile coupons, prizes or discounts â€“ which are presented to users when they check in at or near the user's venue.
The merchant API gives developers access to data from the merchant platform. With the API users can build tools to help manage their foursquare specials and campaigns. It uses RESTful calls and responses are formatted in JSON or JSONP.