The United States Postal Service provides a web API for accessing postal data such as zip codes and rates.
I have 5 digit zip codes, these are retrieved from Google Maps Api. My dilemma is that I have to connect …
api geocode google-geocoder street-address uspsWhy won't the rate work with USPS? I'm using ratev4 and I get an error: Error: API Authorization failure. RateV4 …
php api usps