Does the US verification plan cover both US verifications and US ZIP lookups? Yes, the US verification covers requests that are made to either the US verifications or the US ZIP lookups endpoint. Related articles If an address is unsuccessfully verified, does that count towards my monthly volume? How is Lob’s Address Verification API priced? If I send a letter double_sided, what will be the price of my letter? How can I downgrade my Address Verification plan?