Before you pay for address validation from Smarty, you may be interested in testing our services. For this reason, we give everyone 1,000 free testing lookups. These can be used to look up US addresses in real time, to look up ZIP Codes based on the city and state, to process a list of US addresses, or to access any of the other US address services Smarty offers.

If 1,000 address lookups just aren't enough for the testing that you'd like to do, we're happy to give you as many more as you need. Simply call or email us and let us know you're testing.

In order to test your site locally, you'll need to set up an authorization key for "localhost", or "" (as opposed to your ""). You can set up your authorization keys anytime by logging in to your account and going to the API Keys tab.

Testing against our International address API is limited to the first 100 addresses. We recommend doing your initial testing and integration against our US address API products and leaving testing for international addresses for last. This will make you a Smarty too.