How Inventory Sync Works

FLUF's automatic inventory sync is the core feature that prevents overselling. Here's how it works:

The Problem: When you crosslist an item to 5 marketplaces, and it sells on Depop, you need to mark it sold on eBay, Shopify, and Vinted. Doing this manually is time-consuming and error-prone.

FLUF's Solution: Automatic sync happens in real-time when any sale occurs on any platform.

Step-by-Step Sync Process:

1. Sale Detection

• Webhook (Shopify): Instant notification
• Polling (Depop/eBay/Vinted): Checks every 6 hours
• You can also manually trigger sync

2. Product Matching FLUF identifies which listings are the same product:

Primary method: SKU matching

Fallback: Title + price similarity

Manual: You linked them in FLUF

3. Inventory Update For each matched listing on other platforms:

Quantity decreased by sold amount

If quantity reaches 0, listing is marked as sold/ended

Sync attempt logged in Sync History

4. Confirmation

Success/failure logged

Email notification (if enabled)

Visible in Sync History tab

Sync Timing:

Webhook-triggered: 1-5 minutes

Poll-triggered: Up to 6 hours

Manual sync: Immediate

What Gets Synced: ✅ Inventory quantity ✅ Sold status ✅ Price updates (if you edit in FLUF) ✅ Title updates ❌ Description (too large, can cause issues) ❌ Images (marketplace limitations)

SKU Best Practices:

Always use SKUs for crosslisted items

Keep SKUs unique and consistent

Use alphanumeric codes (avoid special characters)

Example format: BRAND-TYPE-SIZE-001

Variants:

If you have variants (size/color), each variant can have its own SKU

FLUF syncs variants individually

Selling a size M on Depop only marks size M sold elsewhere

Manual Sync:

1. Go to Dashboard or Channels
2. Click Sync Now
3. Select channels to sync (or all)
4. FLUF checks for new orders and updates inventory

Sync History:

View all sync attempts in Channels → Sync History tab

See successes, failures, and errors

Filter by date, channel, product

Retry failed syncs

Common Sync Issues:

Missing SKU: Add SKUs to enable automatic matching

API Rate Limits: Syncs queued and retried automatically

Channel Disconnected: Reconnect in Channels page

Product Deleted on Platform: Manual intervention needed

Preventing Overselling:

FLUF syncs inventory ASAP, but there's always a small window

For ultra-rare items, consider using FLUF as single source and manually listing elsewhere

Monitor Sync History for any failed syncs

Advanced: Sync Preferences

Set sync frequency in Settings (default: 6 hours for polling)

Enable/disable specific channels

Email notifications for failed syncs

Customize which fields sync