Magento Open Source 2.2.x

UPS

United Parcel Service offers domestic and international shipping services by land and air to more than 220 countries.

UPS is discontinuing support of HTTP for its standard CGI service gatewayA transaction bridge between a customer and a payment processing service that is used to transfer money between the customer and the merchant.. If a standard UPS account integration is already enabled for your Magento installation, make sure that the Gateway URLUniform Resource Locator: The unique address of a page on the internet. uses the HTTPS protocol in the UPS Shipping Method configuration. If needed, update the Gateway URL manually to change the protocol to HTTPS. If you are enabling a new UPS configuration for your Magento installation, use the default "United Parcel Service XMLExtensible Markup Language: A markup format derived from SGML that it used to format information for publication and distribution." UPS Type.

UPS uses dimensional weight to determine some shipping rates.