https://www.shipstation.com/fulfillment/api/checkout/
Checkout API for Flexible Shipping Options | ShipStation
Jul 7, 2026 - Integrate ShipStation’s Checkout API to support flexible payment methods and custom page URLs, simplifying checkout and improving the customer experience.
flexible shipping optionscheckout apishipstation
https://shipping.amazon.co.uk/blog/ecommerce-shipping-guide
How flexible e-commerce shipping options can set your brand apart - Amazon Shipping UK
Mar 20, 2026 - As e-commerce sales continue to soar, meeting customer expectations for fast, flexible, and reliable shipping is an essential part of customer satisfaction and...