The Postmark Node.js SDK by Wildbit allows API interaction to implement email features into applications. Installation code included. References explain how to send an email and send a batch of messages.
Founded in 2010 and based in White Plains, NY, Ongage has a simple idea for email marketers: we deliver. It uses different ESPs to deliver mail according to which ones are most likely to succeed in reaching a given email address. Ongage calls this concept "micro-deliverability."
LaunchBit, an email ad network, has announced a text ad API. Whether email publishers are blasting status updates, announcements or other news, the LaunchBit API will allow advertisements within the email to make API calls to data relevant to the ad. Monetizing websites with Ads has long been sound practice; however, monetizing emails is somewhat of an untapped market. With easy integration through an API, LaunchBit intends to take advantage of this underdeveloped market.