This section of the Features Guide covers two parts of working with eBay SOA APIs. The first half discusses how to construct an API call. The second half, starting with Getting Your Keys, discusses how to access the eBay resources and environments with which you can put the call to use in an application. Your home base for application development is the eBay Developers Program.
To perform a particular task with the Trading API (e.g., list an item), you need to send a request using a call. The call names are fairly self-explanatory, like AddItem—which lists an item. The schema defines the messages that you can use to access the eBay database. The API uses request-response style operations.
About eBay Login Credentials
The following login credentials are completely independent and not interoperable across the following sites.
Important: You can avoid common problems that new eBay developers encounter if you understand the differences between the following credentials.
Table: eBay Login Credentials
Site Where Used
eBay username and password
eBay member (real buyer or seller)
eBay site UI www.ebay.com (and corresponding international sites)