Create an Amazon Seller Central account. Information about Amazon selling plans is available here: https://sell.amazon.com/pricing. To list your products on Amazon using feeds, you need to be signed up for the Professional selling plan.

Ensure that the add-on "Amazon Integration" is installed and enabled at your X-Cart store. (See add-on management instructions for X-Cart 5.5).

For product images to be exported to Amazon correctly, the images must be in Amazon S3. For this reason, you will also require the add-on Cloud Images Storage. Be sure to complete the necessary setup and migrate the images to Amazon S3 before exporting products to Amazon.

Contact your hosting service provider's technical support team to perform the server environment setup necessary for your X-Cart store to submit feeds to Amazon and import orders from Amazon. Specifically, ensure that background workers are enabled. If background workers are disabled, a message indicating so will appear at the top of the Amazon Integration page in your X-Cart store's Admin area.

No such message appears on the page if the workers are enabled.

Configure the Amazon Integration add-on settings. See Configuring the Amazon Integration Settings.

Connect one or more Amazon marketplaces/accounts. See Managing Marketplace Connections (Amazon Integration).

For each connected marketplace/account, configure the marketplace settings. For detailed information on configuring data mapping rules at the marketplace level, as well as on configuring the general settings defining how export and import should work for the marketplace, see Configuring Marketplace Settings (Amazon Integration). If you need to set up exceptions to the mapping rules configured at the marketplace level, additional instructions are available in the section Configuring Data Mapping Rules at the Level of Categories and Products (Amazon Integration).

Try submitting feeds to Amazon. See Submitting Feeds to Amazon (Amazon Integration).

You can check the status of any feed submission that was made from your store by viewing your store's feed submission history. The submission history provides feed submission logs listing any errors that might have occurred. This way you can review the errors, make the necessary changes, and resubmit the failed feeds. See Viewing and Managing Your Store's Feed Submission History (Amazon Integration).

After getting some Amazon orders, try importing them into your X-Cart store. See Importing Orders from Amazon (Amazon Integration).