A simple web API built with Node.js and TypeScript that validates credit card numbers using the Luhn algorithm. GET /health - Health check endpoint POST /validate - Validates credit card numbers using ...

Millions of businesses process credit card transactions every day, and those businesses need a way to check to see if a credit card is active or not or if it's a fraudulent card. The issuing ...

A beautiful, modern payment form built with React and TypeScript, featuring real-time card validation, dynamic card type detection, and a stunning glassmorphic UI design. Card icons appear in full ...

You’re at the checkout screen after an online shopping spree, ready to enter your credit card number. You type it in and instantly see a red error message ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Thomas J Catalano is a CFP and Registered Investment Adviser with the state of South ...