# Overview

Two different reporting APIs provide programmatic read-only access to Cornerstone data via the Real-time Data Warehouse (RTDW): the Data Exporter API (DEAPI) and the Reporting API (RAPI). Both APIs are RESTful, adhere to the OData protocol (http://www.odata.org/) and dynamically adjust to reflect any client's schema.

The topics underneath this first 'Reporting' section describe functionality that is common between both APIs. For Data Exporter API specific functionality, see the 'Data Exporter API' topic below. For Reporting API specific functionality, see the 'Reporting API' topic below.