Use downcased and dash-separated path names (i.e. kebab-case), for alignment with hostnames, e.g:
service-api.com/users
service-api.com/app-setups
And for attribute names either use
snake_case, i.e. underscore separators
vehicle_type: "motorcycle"
or
camelCase
vehicleType: "motorcycle"
This allows using dot-notation (transport.vehicleType) in JS instead of array-notation (transport["vehicle type"]).
Whichever you choose, be consistent.