Third-party Authorizations for eBay
eBay requires third-party authorization before SellerCloud can interact with your account. This means you are letting eBay know you are using SellerCloud to manage your account, and you are granting permission for SellerCloud to access it. This is accomplished by fetching a token using SellerCloud's eBay setup wizard.
After third-party authorization is set up, you can see it in your eBay account on Account > Site Preferences >Third-party authorizations.