ShipStation API
ShipStation API is the third-party integration that provides integrated carrier accounts, rates, and shipping labels in QuickStart. Registration and carrier setup begin in QuickStart and continue in the ShipStation API portal.
After registration, use Menu > Settings > Products and services > Shipping to refresh integrated carriers. Manage the API account in Menu > Integrations & Apps > ShipStation. Use the portal to maintain carrier connections, billing, and funding information.