First, invite FeedStation to join your Amazon Seller Central account:
After we receive the invitation, we will accept it with the firstname.lastname@example.org account. You will then receive a notification to approve it. Please grant us (at minimum) access to view and edit your inventory and orders. Additional permissions may be required after initial setup.
Next, allow FeedStation to access your account through the Merchant Web Services API:
Please copy and paste your Merchant ID and Marketplace ID values here: