ISAPI (Internet Server Application Programming Interface)

ISAPI (Internet Server Application Programming Interface) is a set of tools provided by web servers like Microsoft IIS that allows developers to create custom modules or applications to extend the server’s functionality. Think of it as a way to add specialized procedures or features directly into the web server, enabling faster processing, custom content handling, or security enhancements. Instead of relying only on standard server actions, developers can use ISAPI to optimize and tailor the server's behavior for specific needs, making web applications more efficient and powerful.