Endpoint is that base address for the USPS API.

ErrorCodes contains USPS code mapping to eApp error codes.

VerifyAPI is the name of that API that handles address verifications.

Address represents the structure for the <Address> element information in a USPS request and response.

AddressValidateRequest contains the information necessary to execute an address validation webservice request The USERID refers to the api key that must be sent with each request.

AddressValidateResponse contains the information returned from a successful webservice request.

Error is the structure for responses resulting in an error.

ErrorResponse stores a system level error.

ErrUSPSSystem is the expected structure of the USPS system.

Geocoder geocodes address information using the United States Post Office webservice API docs can be found https://www.usps.com/business/web-tools-apis/address-information-api.htm.