To integrate your Shipping Easy account with PSS you will need ro provide the appropriate API credentials. Once you have logged into Shipping Easy go to Settings > API Credentials.
From here you will find the API Key and API Secret, please copy these and paste in the appropriate fields in PSS. Again, go to Settings > Stores & Orders and you will find the Store API Key, copy and paste into PSS. Make sure the enable button has been selected and save your settings. Once this is completed PSS will retrieve your orders from all the marketplaces and push them into Shipping Easy so you can process the shipments. Once a order has been shipped, PSS will retrieve the tracking information and send to the customer or marketplace on your behalf.