i want a API which can validate user entered zipcode/pincode.
for example if user has entered a zip code 00501. then i need to validate that user entered zipcode is present in USA or not.
posted 3 years ago
You can license current ZIP data from the USPS and integrate it into your app directly; that's probably the fastest approach. The USPS may also have a web API. From past experience I would guess that neither option is free.