This plugin is developed to help the ecommerece platform. So they can reduce effort of adding new shipments into Apc Overnight and focus into the areas which can really give them benifit in term of revenue.
WooCommerce APC Overnight Plugin is using thired party APi which is exposed by APC Overnight to the developers so they can easily integrate their systems with APC Overnight make workflow more handy.
If you are getting error while intializing plugin than please write us here: plugins@tricasol.com .