eBay’s Large Merchant Services (LMS) is a set of APIs that enable an online seller’s application to send large amounts of inventory to eBay. Using LMS enables large merchants to shift the processing burden for large call volume (and call retries) from your server to eBay servers, reducing your own bandwidth and connection requests. Also, merchants can upload and manage price and quantity updates for thousands of eBay fixed price items and download large amounts of order, invoice, and active listing information.
eBay’s Large Merchant Services uses the following three APIs: