I don't see FedEx One Rates when I rate shipments via EasyPost
When users rate FedEx packages via EasyPosts API rating service they will often see FedEx service names like:
Many users wonder why they do not see any FedEx services called "One Rate". FedEx One Rate is not a separate FedEx service type, but instead is a pricing schema FedEx has made to give flat-rate prices when users use eligible packaging. Users will not see rates with "One Rate" in the service name, instead they will continue to see the regular FedEx services as noted above, but the prices returned will be the proper FedEx One Rate prices for those services.
EasyPost users who want to declare that they are utilizing FedEx packaging eligible for One Rate pricing can use the "predefined_package" key as documented in the Parcels section of our API documentation. Here is a list of available predefined_packages for FedEx: