An Application Programming Interface allows you to connect software components together. They can share data and functionality for seamless integration with your current applications and web services. Payment solutions APIs let you add a secure and reliable checkout method into your ecommerce website or put direct payment options into your accounting and invoicing tools. Your software provider may use one of several API types, depending on their preferences and the functionality they’re offering. It’s good to know when considering the path for possible integration and development between different software platforms.




REST, or Representational State Transfer, is a commonly used API category that is not dependent on a specific protocol. It offers a flexible integration option that allows developers to use a standardized set of processes to achieve their goals. The architectural style is straightforward and streamlines the connection between the client and server. REST is considered a relatively user-friendly API to work with, and many developers are experienced in this technology.




SOAP, or Simple Object Access Protocol, is an API that connects different platforms together through HTTP and XML. The structure and requirements for SOAP are more rigid than REST, and it’s defined by a specific protocol. Web applications have started moving away from this older API type, as it’s harder to implement flexible integration. However, this structure does allow for more stringent security measures and includes stateful operations without custom coding.




ASP.NET is a specific form of a REST API designed around .NET technology. In most cases, a Windows server is required to easily work with this technology. The primary benefit to the .Net API type is the structured framework that’s in place. If you’re working with Windows-based technology, you can send HTTP protocol messages to a variety of platforms. The entire framework is lightweight and easy to work with, which can speed up development time and add flexibility into your third-party integration.

APIs are a powerful tool for working closely with your payment solution. You can improve your user experience by keeping customers on your site rather than sending them elsewhere, and you have many ways to work with the data and features available from your card payment solutions. When you’re choosing a new payment provider, take a look at the API types they offer and what you can do with it in your existing infrastructure.

If you have any questions on the API’s and the payment solution flexibility we can offer with your CRM, accounting or website software feel free to contact us at Integrapay.