1. When you install the app from AppExchange you will be prompted to authorize api access to the following domains:
    1. accounts.google.com
      onlinetools.ups.com
      production.shippingapis.com
      secure.shippingapis.com
      stg-secure.shippingapis.com
      ws.fedex.com
      wsbeta.fedex.com
      www.googleapis.com
      Wwwcie.ups.com
    2. This is to communicate with Fedex, USPS, UPS for shipment label creation, rate checking, and status checking.  Google is for Google Drive if you want to save your shipping label images to your Google Drive.
    3. You will still need to configure your own account information for all these and authorize each connection.