The Smartstore Web API is based on OData (Open Data Protocol), a standard for retrieving data using REST conventions. Starting with version 4.1, the Smartstore Web API supports the greatly expanded version 4 of OData.
The Smartstore Web API allows direct access to the data of an online store. It is built on the most recent technologies Microsoft offers for web based data consuming, the ASP.NET Web API and the OData provider. Crafting Interfaces that Developers Love