Go to Products -> Manage Inventory -> Marketplace Inventory 

or Marketplaces -> Marketplace Inventory Management

This feature is only available in Unicart Pro Plan and above.

Marketplace Inventory Management is designed to check inventory from marketplaces to ensure inventory is updated with Unicart. At the same time, you can also update and sync inventory to multiple marketplaces instantly to top up stock or avoid overselling.


Here are some scenarios that you would use this function to manage inventory to marketplace.

  1. You want to monitor your marketplace inventory closely to ensure everything is under control.
  2. You have top up your stock and want to update inventory to marketplace and sell more.
  3. Unplanned stock reduction and you want to update inventory to marketplace to avoid overselling.
  4. You want to sell different quantity to different marketplaces.
  5. You found that inventory from marketplace is not tally with Unicart.

Please note that this is working for those synced products and marketplace inventory update only. If you would like to update inventory for your web store, please perform at Products -> Manage Inventory first before using this.

Check Marketplace Inventory

Step 1 – Select marketplace

You have to select marketplace that you wish to check or update inventory. You can select and display up to 3 marketplaces at one time.

Step 2 – Check marketplace inventory

Click Check button to retrieve inventory instantly from marketplace. Once it finish loading, it will show the balance for each of the product from marketplace on the current page.

You will find that Check button is missing for Lelong. Due to Lelong API given, it is not allowed to retrieve inventory data from Lelong automatically.

Update Marketplace Inventory

Step 3 – Update inventory to marketplace

If you just want to sync inventory to only one marketplace, you just have to update inventory in the particular marketplace column.

For example, you just want to update 9 units to Lelong, insert 9 in Lelong.my column. 

If you would like to sync different inventory to different marketplaces, you can just update different quantity in marketplace column respectively.  

If you want to sync the same inventory to all the marketplaces, you can just update inventory in Update All column, the rest of marketplace column will be updated automatically.

If your product has been generated with option value, please update inventory on option level only for 11streetLelong, Qoo10 and Shopee. For Lazada, please update inventory on both main column and option column.

Step 4 – Sync inventory to marketplace

Once you have done updating inventory, click Sync button and system will be triggered to sync inventory to marketplaces. It will sync inventory of one product to 3 marketplaces at one time, to avoid massive update to marketplace API server.

As long as there is a number or quantity in the column, once you click Sync button and it will be syncing the inventory to marketplace, except the column filled with -.

After it done syncing inventory, it will show success status. We would suggest you to cross check on marketplace end to ensure that inventory has been successfully updated to marketplace. 

Please note that if you check or update inventory to Lazada, it will result in Allocated stock from Lazada.

Additional information

Trace Order

You can even trace the orders for the products purchased within 24 hours, 48 hours or 72 hours. You can just click Filter Products -> Select the period to trace order -> click Filter button, and it will list the product with available quantity that purchased within the chosen period. With this function, you can monitor and manage your marketplace inventory from Unicart to ensure it is up-to-date.

Please note that the orders can only be traced if the marketplace orders have been synced to Unicart and the products have been mapped between Unicart and Marketplace.

Lazada Reserved Stock Reduction

You will notice that Lazada will come with reserved stock reduction. Reserved Stock function is used for backup purpose so that you will reserve some stock in the backend and will not sell 100% of your inventory to Lazada to avoid overselling.

For example as screenshot below, you have 10 quantity for Lazada and tick the option of reserved stock reduction with 3 quantity, it means that you are only syncing 7 quantity to Lazada for the particular product. Otherwise, if you untick reserved stock deduction function or never configure it, there will be nothing to deduct from reserved stock and sync 100% of your inventory to Lazada.

If you have filled up the reserved stock quantity during Lazada sync before, it will show the reserved stock quantity in Marketplace Inventory Management.


Please note that it works for Lazada, 11streetLelong, Qoo10 and Shopee at the moment due to API requirement, we will enhance from time to time.*