Email Quality Checker
This API is found at https://mailboxlayer.com is used for evaluating emails and how legitimate the email could be. A use case for this would be verifying people signing up for an website are using emails that are valid and less likely to be spam the service. This will ensure that real people are signing up rather than one person generating email accounts and using the service maliciously. The API will generate a score from the email address and provide the user the score from information such are what kind of domain is it created from and if it is free or not which will tell if the email is of a bad quality which is not worth sending things to or approving or is it a good quality email worth being approved.
The code for the page can be viewed here.
I learned how to implement an API and how to find use cases for them that can be applicable to businesses.