Using eBay RESTful APIs: From authentication (OAuth) to error handling, a guide to working with eBay's RESTful APIs.
Release indicators (see API launch phases): 
Beta 
Experimental 
Limited Release
Sell APIs
Create end-to-end selling applications to help professional sellers with their selling activity on eBay. From configuring account settings and listing inventory on eBay to marketing listings and reporting on seller performance. The selling APIs help you create applications that enable sellers to grow their business on eBay.
Selling Integration Guide: How to use eBay APIs to help professional sellers add their inventory and grow their business on eBay.
Buy APIs
These APIs are for eligible developers only. For details of what is requried and how to apply, see Buy APIs Requirements
Turnkey solution for creating buying experiences in your app or website. Retrieve purchasable items, check out, then track orders without visiting the eBay site.
Buying Integration Guide: How to use eBay APIs to create great buying applications.
Commerce APIs
Developer APIs
Traditional Searching APIs
Traditional Shopping/Buying APIs
Traditional Selling APIs
List and manage inventory, fulfill orders, communicate with customers, and more.
eBay Features Guide: How to use eBay APIs to implement eBay features. Find use cases; learn workflows.
1 The Listing Recommendation API is scheduled for deprecation. We recommend you integrate with the the new Recommendation API to retrieve recommendations for improving your listings and sales performance, or with the Compliance API to discover non-compliant listings or listings that are at risk at becoming non-compliant in the future.
2 eBay recommends the Merchant Integration Platform for bulk inventory management. The Large Merchant Services documentation is still available for anyone who has already integrated.
3 eBay recommends the The Related Items Management API has been deprecated and is no longer functional. We recommend you integrate with the Marketing API for managing sales promotions for seller inventory.
After Sale APIs
Manage cancellations, returns, and disputes, as well as provide communication between buyers and sellers.
eBay Features Guide: How to use eBay APIs to implement eBay features. Find use cases; learn workflows.
| Overview | API Reference | Release Notes | |
| Post Order API | |||
| Resolution Case Management API 2 | — | — | — |
| Return Management API 3 | — | — | — |
1 eBay recommends the Post Order API for managing after-sale problems, such as cancellations and returns. The Resolution Case Management API documentation is still available for anyone who has already integrated.
2 eBay recommends the Post Order API for managing cancellations, returns, inquiries, and escalations. The Return Management API documentation is still available for anyone who has already integrated.