Unlike Poshmark/Mercari/Depop/Vinted, eBay has an official OAuth flow. You\'ll sign in on eBay\'s own page; eBay sends Closo a token; Closo can list and edit on your behalf.
1. Marketplaces → eBay → Connect.
2. eBay\'s sign-in page opens in a new tab.
3. Click I Agree. eBay returns you to Closo. Done.