How can I find out if an Item was listed / Relisted via the website or my application via API calls?
You can use the either of the tags UUID, SKU or ApplicationData to
identity if an Item was listed using the API as these are not available via the
You can pass in anyone of these tags in the AddItem / RelistItem API call
request to establish that the item was listed via the API, since the SYI flow
does not offer these tags:
When you make subsequent GetItem calls, you will be able to get these fields
back in the response.
For Relisting the Item, if you do not make any changes to the item, the
ApplicationData and SKU will be carried over from the original item, however
UUID will not be carried over unless you specify a new UUID. Hence, of the
three, UUID is the best alternative, because it prevents duplicate listings
also, besides helping you identify that it was listed using the API.
As for MyeBay, there is no way to find out how the item was listed /