"eBay this week is expanding its developers program, providing a single API schema to link to the e-commerce vendor’s site and adding other resources. The eBay Developers Program allows for development of third-party front ends to the eBay e-commerce site. The program has spawned more than 1,000 applications and 15,000 members who generate 1.7 billion Web services calls per month […]
A key improvement is unification around a single API schema to provide consistency when developing eBay applications. The API schema is featured in the eBay Web Services component of the program and is based on eBay’s current SOAP offering. It supports five interfaces: SOAP, XML, .Net, Java, and REST."