The National Identity Number (NIN) Verification API is a straightforward tool that allows businesses in Nigeria to check the identity of their customers by simply entering their NIN. Once a business sends a NIN to this service, it quickly gets back a full profile of the customer, including their name, photo, and other key details. This makes it incredibly easy for any kind of business - like banks, phone companies, or online shops - to make sure their customers are who they say they are.