To receive an address for a house, apply with the government agency in charge of addresses -- most likely a city agency for houses within city limits and a county agency otherwise. Fill out the necessary forms, attaching the required paperwork either online or in person.
Once assigned an address by the city or county, you may also need to ensure that the post office registers the address in their system. Although this is usually done automatically by the agency that assigns the address, double-check to avoid problems with deliveries. If not, take the deed and paperwork assigning the address to your local postmaster, and follow the procedures to get the address into the main system. Once in, the address should propagate to other delivery agents and eventually to online services that only deliver to registered addresses.