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This manual covers the same authorisation flow and states the prerequisite outright. You need a Professional Amazon seller account, because Amazon reserves the inventory and order APIs an integration depends on for that plan.
On an Individual plan the authorisation can appear to succeed while listings and orders never move. Upgrading the selling plan in Seller Central fixes it, and checking first saves you a wasted afternoon of catalogue preparation.
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The complete account authorisation flow in under a minute, from the Salestio accounts screen to an approved Amazon connection.
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The same authorisation flow seen from a BigCommerce store, for merchants who want to check the BigCommerce screens before starting.
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How to match products you already sell on Amazon to the matching Shopify products, so stock and price sync without creating duplicate ASINs.
Start a free trial, authorise your seller account and link your first listings, following these videos on your own catalogue.
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