The REST API and Webhooks options are intended for those shippers who have an order system that they developed or can do custom development for. The REST/Webhooks API provides the same level of integration capability as you would have in one of our native integrations. You are required to do all the programming on your software to connect and communicate with this API. The endpoints and documentation for the REST/Webhooks API is located here: https://xpsship.rocksolidinternet.com/restapi/docs/v1-ecommerce/
XPS WebShip