Connecting is an OAuth handshake between your Seller Central account and MarketplaceHub. No password changes hands. Nothing is shared with anyone else. And you can take the access back whenever you want.
Two things on Amazon’s side. Check them before you start.
Individual accounts don’t include Selling Partner API access. So automated listing, inventory and order sync can’t work on one.
Good to know: this is an Amazon restriction rather than ours.
Sign in to Seller Central for the marketplace you want to connect.
Sell in several countries? Each is authorised separately, then managed together afterwards.
Three steps on Amazon’s side, then you’re back in MarketplaceHub.
Find MarketplaceHub on the Selling Partner Appstore for your marketplace. We’re a verified developer, so the listing is Amazon’s own page, not a redirect somewhere else.
Amazon shows you what the app may do before you agree. Approving hands MarketplaceHub a token scoped to that seller account. Your password is never involved.
Amazon returns you to MarketplaceHub and the marketplace appears in your dashboard. Its product-type and category data starts importing in the background.
Each area of access maps to something you asked the platform to do.
It is used only for the stores where you turn Multi-Channel Fulfillment on.
To create and revise your listings. And to read Amazon’s product types and required attributes for the categories you sell in.
To submit stock and price updates as your catalogue changes. And to read the featured-offer pricing that competitor repricing rules use.
To pull your FBM and FBA orders in. And to send shipment confirmations, tracking, refunds and cancellations back.
To collect the outcome of every submission. So a rejected listing comes back to you with Amazon’s reason, rather than disappearing.
To create, follow and cancel Multi-Channel Fulfillment orders. And to read your FBA stock, so Amazon can ship orders from your other channels.
Connecting isn’t only a token exchange. A fair amount of setup runs on its own once the marketplace appears. So you’re not asked to configure things the API can tell us.
Amazon’s product types and their required attributes are pulled for the marketplace you connected.
This is what later lets AI put a product in the right category, and know which fields that category insists on.
It appears on your dashboard with its own state. Several marketplaces never blur into one “is it working?” question.
From there it’s bringing your catalogue in and mapping it: the Feeds stage. No hunting for what to do next.
Listings on AmazonIf Amazon starts refusing our calls, most often from a revoked or expired authorisation, the connection is flagged in your dashboard and you’re notified. Syncs never fail quietly.
Re-authorising uses the same appstore flow and restores the existing connection. Your catalogue, mappings and history stay as they were.
Withdraw access from Seller Central at any time. Or pause the marketplace in MarketplaceHub, if you only want syncing to stop for a while.
The four causes that account for nearly all of it, and what each looks like.
The authorisation completes but nothing syncs. The API access a Professional account carries isn’t there.
Fix: upgrade in Seller Central and reconnect.
Authorising from the appstore of a country you don’t sell in connects an account with no listings.
Fix: check the flag on the marketplace card against where you actually sell.
Someone revoked the app in Seller Central. Calls start failing at once and the connection is flagged.
Fix: re-authorise. It restores the connection without losing anything.
Amazon’s grants don’t last forever. It looks the same as a revocation.
Fix: run the appstore flow again.
What the authorisation covers, and what it doesn’t.
Connect Amazon, eBay, Shopify and Etsy in one place.
