Canadian based startup LoginRadius is a Software As A Service (SAAS) provider of social infrastructure (Social Login and Social Sharing) that is currently used by over 25,000 websites. Despite being a fairly new service (The company was founded in May 2011), LoginRadius has expanded rapidly, partly in thanks to the LoginRadius API.
The new Google Patent Search API is now available and lets you search over 7 million patents via code. It is part of the AJAX Search API suite of content-specific Google search utilities such as book search, government search, code search and others.
With Twitter reducing its search history to four days, it is a challenge for applications that are dependent on search results, that went not days but even months back. Several applications have taken on the challenge to fill this void and are building search indexes on top of Twitter. Topsy is one of them and it's sharing its results as an API.