Amazon Marketplace Integration: What to Check

An Amazon marketplace integration connects your Seller Central account to another tool so orders, fees and costs flow across automatically. Connecting is the easy part. The question that matters is what data comes back, and whether it is complete enough to trust.

What a good Amazon integration should bring in

• Orders and units, by marketplace and by product
• Referral fees and FBA fees, taken from each order
• Sponsored Products and other ad spend, matched to the sales it drove
• Refunds and returns, charged back to the right SKU
• Stock levels, so you can see reorder risk next to sales

Check the marketplaces you sell in

Amazon runs separate marketplaces by country, each with its own currency, fees and VAT rules. If you sell in the UK, Germany and the US, check that every one connects and that currencies convert sensibly.

Where integrations quietly fall short

• Fees estimated at a flat percentage instead of taken from the real order
• Ad spend shown in a separate report and never tied to profit
• Refunds recorded in the month they happen, not matched to the original sale
• Cost of goods not loaded, so profit is really just revenue less fees

What to do once it is connected

Load your product costs, check a handful of orders against Seller Central to confirm the fees match, and compare profit per SKU to the sales you assumed were good. Most sellers find at least one popular product that makes far less than they thought.

A checklist for the first week

• Day one: connect each Amazon marketplace you sell in
• Day two: load product costs for your top 50 SKUs
• Day three: check five orders against Seller Central
• End of week: list your five lowest-margin products and decide what to do with each

Does connecting Amazon give me access to my data?

You authorise a tool to read data from Seller Central. Reputable tools ask only for the permissions they need. Review what you approve.

Can an integration include FBA fees?

It should. FBA fees are one of the largest costs for many sellers, so a profit figure without them is overstated.

What about sellers on Amazon Vendor Central?

Vendor Central works differently from Seller Central. We list Amazon Vendor Central in our integrations, so ask us how it applies to your account.

WhatSales connects to Amazon Seller Central and rebuilds each order into one profit figure after referral fees, FBA fees, ad spend, refunds and product cost. The details are on /integrations/amazon, and you can compare other channels from /integrations.