To integrate Tophatter with ShipStation, login to your Tophatter admin panel and locate the API section on the lefthand Seller Tools sidebar.
On the Tophatter Merchant API page that appears, copy your auto-generated Access Token.
Now, head to your ShipStation account's Store Setup page and click + Connect a Store or Marketplace and select Tophatter.
Enter your Access Token into the Access Token field in the Connection Modal that appears.
Click Connect and your orders will begin importing!