API
Interface that lets two systems talk to each other — the foundation of every modern integration.
An API (Application Programming Interface) is a contract that defines how one system can request data or functions from another. Modern APIs typically use HTTP and formats like JSON. If your CRM connects with your invoicing system, there are APIs in between. Designing good APIs (stable, well-documented, versioned) is what makes an integration last years instead of months. Spiralway designs and implements APIs as a natural part of any integration project.