Great.

Your service is doing more than simple verification. Verification by its nature would result in a boolean. Your service is suggesting a better address (which is what I'd call normalization). e.g.

    curl https://www.geteasypost.com/api/address/verify \
      -u cueqNZUb3ldeWTNX7MU3Mel8UXtaAMUi: \
      -d 'address[street1]=388 Townshende Ave' \
      -d 'address[street2]=Unit 20' \
      -d 'address[city]=San Francisco' \
      -d 'address[state]=CA' \
      -d 'address[zip]=94107'

yields:

    {"address":{"street1":"388 TOWNSEND ST APT 20","city":"SAN FRANCISCO","state":"CA","zip":"94107"}}

Anyhow, semantics aside, are you going to make it fuzzier or this is based entirely on USPS' api?