I Built a VAT Number Validator API for 35 Countries - Day 3 of 21

📰 Dev.to · Ruan Muller

Learn how to build a VAT number validator API for 35 countries using Node.js and JavaScript

intermediate Published 12 Apr 2026
Action Steps
  1. Build a Node.js project using npm init to create a VAT number validator API
  2. Use JavaScript to create functions that validate VAT numbers for different countries
  3. Implement API endpoints using Express.js to handle requests and return validation results
  4. Test the API using Postman or cURL to ensure it works correctly
  5. Deploy the API to a cloud platform such as Heroku or AWS
  6. Configure the API to handle requests from different countries and return localized error messages
Who Needs to Know This

Backend developers and full-stack developers can benefit from this tutorial to learn how to create a VAT number validator API

Key Insight

💡 Validating VAT numbers is crucial for businesses operating in multiple countries, and creating an API can simplify this process

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🚀 Build a VAT number validator API for 35 countries using Node.js and JavaScript! 📈
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