So, I have to validate that customer's zip (postal) code matches the country provided and that is valid. I need it for EU.
What is the best API service to do that? And how accurate these services are?
I found http://www.zippopotam.us/ and some more, but I would like to hear some more opinions.
Regards
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Mario Giambanco
Director of User Experience Development
In the USA, the USPS API is pretty good - I use it on my sites and it works well.