EBSCO offers an XML API resource called the EBSCOhost API which can be used to connect to EBSCO Discovery Service (EDS).
Web Service is ideal if you'd like to integrate EDS content directly into your website. For example, you can pull search results directly into your library portal for ease of use, or use the Web Service to display similar results to a search. You can use this API to develop your own library portal to connect to EBSCO Discovery Service content.
For more information about searching EDS with Web Service, please see the EBSCOhost Integration Toolkit Support Center.