EveryBlock aggregates public data from 5 metro areas across the United States. The data available varies by city, but is all made available via the EveryBlock APIs by providing schemas for each metro area. The company also provides a widget for light weight integrations. The Content API is used to publish content from Everyblock's aggregation platform. This is a REST based API with responses in JSON format. Everyblock combines different types of data, localizes it, and makes it available to developers through its APIs.
The use of location in applications is a key differentiator today. While the current craze towards Location Based Services is gravitated towards deals, coupons and services, we often overlook the most fundamental of them all i.e. the news in your vicinity. Outside.in, a location based news aggregator, has welcomed 2011 with enhancements to its Outside.in API that could give rise to a new set of hyperlocal news.
Before there was a Google Maps API, Adrian Holovaty created Chicago Crime to show updated crime data by location. Holovaty's lessons were later put into play in the Knight Foundation-funded EveryBlock, now owned by MSNBC. And now, EveryBlock has an API.