
Quantity Rules let you control exactly how much inventory is sent from specific fulfillment warehouses to specific marketplaces. You can define a fixed quantity of available stock to allocate, giving you more flexibility in how inventory is distributed across channels.
This feature is especially useful when you want to protect stock in one location, prioritize certain marketplaces, or avoid overselling. For example, you may want to send only a few units of inventory from your warehouse to Walmart, keep a fixed quantity reserved for Shopify, or limit a warehouse to supplying only one marketplace. Quantity Rules help you manage risk, maintain balanced stock levels, and align inventory allocation with your overall sales strategy.
Step by step instruction on how to create a simple rule
Assigning a rule to a specific marketplace for a specific product.
Let’s say we want to prevent overselling, so we want to send quantity 0 to Walmart when a specific product’s quantity goes below 5.
- Go to Inventor > Quantity Rules.
- Start by creating a new rule. Click the “+ Rule” button. In this case, we want to send 0 to a warehouse when the quantity drops below 5, so we prevent any overselling.

- Now we need to assign the rule to the product. Click the “+ Assign Rules” button.
- In the first step, select the newly created rule.

- Next, select the warehouse you want this rule to apply to. In this case, select the warehouse called NYC Warehouse, as it is connected to your Walmart store.

- Then select Walmart only. As mentioned before, make sure the warehouse selected in the previous step is actually connected to this marketplace.

- Next, select the product you want this rule to apply to.Please note: if you do not select any products here, the rule will apply to all products stored in the selected warehouse.

- The last step is just a confirmation that provides a description of what you are about to activate. Click Finish to apply the rule.

- Below is how this will look after implementing it. As you can see, the rule is listed under Rules Applied to Specific SKUs. To unassign the rule, simply click Delete next to it.

- If in the step where you select a product you do not choose any, then the rule will appear on the left, under the section Rules That Apply to All SKUs.

- This is how it will look on the inventory page. When the quantity drops below 5, you will see an additional entry showing quantity 0 going to Walmart.

- When the quantity is above 5, you will see just one number, as it goes to all connected marketplaces.

This feature is very powerful and advanced. We suggest contacting our support team for an initial consultation and training before setting it up.