Fuel's APIs are the foundation of our platform. Fuel provides both SOAP and REST APIs to support both cloud and enterprise development scenarios.
Fuel's SDKs enable developers to build on ExactTarget using native language constructs. Fuel SDKs are available for Java, .NET, PHP, Python, and Ruby.
Backed by a flexible data model and multiple integration methods, AMPscript makes it easy to build highly-targeted, personalization communications.
The ExactTarget Marketing Cloud is extensible, enabling you to customize it to your exact needs and bring apps to market in the HubExchange marketplace.