What this endpoint does

This REST API calculates the total landed cost for shipping a cart of products internationally.
It determines all costs your customer will pay, including:

• Duties
• Import taxes
• Other customs-related charges

Showing a fully landed cost upfront gives your international customers transparency at checkout, reduces delivery surprises, and helps you offer Delivered Duty Paid (DDP) shipping.

When to Use This API

• During checkout: Calculate the total landed cost in real-time when the user enters a shipping address.
• In the shopping cart: Let shoppers see estimated import charges before they even reach checkout.
• Before creating a draft order: Validate total shipping costs so your system can show an accurate final price, including duties and taxes.

Key business benefits

• Eliminate unexpected customs charges that cause cart abandonment.
• Enable a DDP (Delivered Duty Paid) experience: you collect duties and taxes at checkout.
• Improve international conversion rates by being upfront about total cost.
• Optionally guarantee the estimate: if all required fields are provided, your business can absorb the final bill.

What this gives your merchants

• One shipment → One or more ship-from → One or more shipping rates → Multiple items
• The system returns duties, taxes, and fees* for each shipment and rate, so merchants can present accurate options at checkout.

How to ensure a guaranteed calculation

• All required fields must be accurate.
• Certain destination countries require Province/State and zip code to guarantee compliance.
• If fields are missing, your calculation may be non-guaranteed and final charges could differ.