eBay Integration
TLDR
StackKnack connects to your eBay seller account via the eBay API. Inventory syncs bidirectionally in real time. When an item sells on eBay, all other connected channels update. When inventory changes elsewhere, eBay listings update.
Who this is for
- Resale businesses that sell on eBay alongside other channels
- Sellers who list high-value sneakers and luxury items on eBay
What it does
Bidirectional inventory sync
- eBay to StackKnack: When a sale or Best Offer acceptance happens on eBay, StackKnack updates its central inventory count and pushes changes to all other channels.
- StackKnack to eBay: When inventory changes on another channel (e.g., a Shopify sale), StackKnack updates the eBay listing quantity. If the last unit sells, the eBay listing is ended.
Listing management
StackKnack tracks eBay listing data:
- Item title
- Item specifics (brand, size, color, condition)
- Listing price (Buy It Now or auction)
- SKU mapping
- Quantity available
Fee tracking
StackKnack records eBay fees for margin calculation:
- Final value fee
- Payment processing fee
- Promoted listing fee (if applicable)
Setup
- In StackKnack, navigate to Integrations > eBay.
- Click "Connect eBay Account."
- Sign in to your eBay seller account and authorize StackKnack.
- StackKnack imports your active listings and inventory data.
- Initial sync may take a few minutes depending on the number of active listings.
Sync behavior
| Event | Direction | Latency |
|---|---|---|
| Sale on eBay | eBay → StackKnack → other channels | Under 30 seconds |
| Sale on other channel | Other channel → StackKnack → eBay | Under 30 seconds |
| Last unit sold elsewhere | StackKnack → eBay (listing ended) | Under 30 seconds |
| Manual inventory adjustment | StackKnack → eBay | Under 30 seconds |
Limitations
- StackKnack requires an active eBay seller account with API access.
- eBay API rate limits apply. Sellers with very large numbers of active listings (5,000+) may experience longer initial sync times.
- StackKnack syncs inventory quantities and tracks sales. It does not manage eBay listing templates, promoted listings settings, or shipping policies.
- Auction-style listings are tracked for inventory purposes but cannot be quantity-adjusted mid-auction.
- If the eBay API is experiencing downtime, sync is paused and resumes automatically when the API is available.