We don’t have any built-in integration with a fulfillment solution such as Shipstation, EasyPost or Shippo yet.
However, it’s possible to leverage our APIs, Webhooks and the service’s APIs to build the integration.
Our Webhooks Shipping API can be used to return shipping methods from the solution of your choice. In your Webhook handler, you can use the service API to retrieve shipping rates, the Webhook content will contain all the information you’ll need, such as shipping address, items, etc.
Once the order is completed, you can then use our order.completed event documented here to create the order by using the service API. Most of them will allow you to do that.
If you want to push the integration even further and use our feature that allows merchants to send tracking number from the dashboard, this can be done programmatically too.
You can start by updating the order and set the trackingNumber and trackingUrl that would be returned by your shipping service. Then, you can add a notification that will automatically be sent to the customer.