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eBay

Listing imports, why price and quantity travel with the inventory submission rather than separately, and the signing requirement on EU/UK order operations.

eBay is both a source and a publishing target. It is not currently available as a price and stock source of truth.

On eBay price and quantity travel inside the inventory submission rather than as a separate feed, so a price change re-sends the listing record — and EU and UK order operations additionally require a signed request AMAZON — TWO FEEDS Content Price and stock eBAY — ONE INVENTORY SUBMISSION The inventory record content price quantity One call carries all three What that means in practice A price change re-sends the listing record rather than a small price feed. Same result, more payload. Importing from eBay Your live listings are paged through eBay's API and land in the hub keeping their eBay item id. EU and UK order operations must be signed eBay requires a signed request on order operations in those regions. It is a requirement of theirs, handled for you — but it is the reason an order write can fail for a reason that has nothing to do with the order itself.
One submission carries content, price and quantity together.

Importing from eBay

Your existing listings are pulled in and staged like any other source, carrying the eBay category they are already filed under — so republishing to eBay skips classification.

Publishing to eBay

eBay differs from Amazon in one way worth planning around: price and quantity ride along with the inventory submission rather than having a separate channel. A price or stock change therefore goes out through the same path a content change does.

Taxonomy

eBay categories are imported per country on a recurring schedule and versioned the same way Amazon's product types are.

Orders

Orders are pulled from eBay, and cancellations and refunds can be pushed back.

One operational note for EU and UK sellers: eBay requires digitally signed requests for some order operations. Where that signing is not configured, refund and cancel calls are refused by eBay — the listing side is unaffected.