Day 5 of my 21-day API challenge is done. Yesterday I built a Text Readability Scorer. Today I built an Email Validator & Disposable Email Checker API — validate any email address and detect fake, throwaway and role-based emails instantly. Previous days: Day 1 — Invoice & Receipt Parser API Day 2 — Password Strength & Security Scorer API Day 3 — VAT Number Validator API Day 4 — Text R