When choosing a payment provider and using payment gateway service https://en.monoup.com/, the first step is to define what features you need. Since you mentioned security and multiple currencies, you’ll want to look for one that offers strong fraud protection, compliance with global regulations, and supports a variety of payment methods. If you have a development team, API integration is often the best option because it allows for greater customization and control over the checkout experience. However, third-party services can be easier to implement if you want a quicker solution with minimal coding. A major factor to consider is transaction fees—some providers charge a flat fee, while others take a percentage. Be sure to check their terms and compare them carefully before making a decision.