Crosslister is the heart of Closo. You add a product once with photos, title, description, price, and condition. Then for every marketplace you turn on, Closo:
1. Translates your fields into what that marketplace expects (eBay needs item specifics, Mercari has a strict category tree, Vinted wants colors, etc.).
2. Posts the listing through the extension — it's your browser, signed in to your accounts, doing the work.
3. Tracks the listing's state: Drafted → Queued → Dispatched → Posted → Live.
4. Watches for sales, sold cascades (when one platform sells, the others delist), and edits — keep all marketplaces in sync.
Why two queues
Closo runs two pipelines under the hood. eBay and Shopify use direct API calls (faster, server-side). Poshmark, Mercari, Vinted, and Depop go through the extension in your browser — that's required by those marketplaces. Both pipelines are designed to look like normal seller activity, with human jitter to keep your accounts in good standing.