Magnento Shipping Online Rates
Apart from static options such as flat rates and table rates, Magento CE also offers dynamic retrieval of rates from various shipping providers.
To enable and configure these shipping methods, expand the appropriate tabs (UPS, USPS, FedEx, or DHL) and configure the settings. The configuration of this method is similar to the configuration of a Flat Rate, as described above. The exact options depend on the service provider; contact the provider for more information.
For example, UPS rates can appear in your web store