What is Hoverfly?

Hoverfly is an open-source API simulation tool (service virtualization). It allows you to simulate HTTP(S) services by recording and replaying network traffic. This is useful for testing, development, and integration scenarios where you want to isolate your application from external dependencies or create repeatable and predictable test environments. It's commonly used to replace real APIs with simulated ones, reducing reliance on external services, and improving test reliability and speed.