I guess that we more often think about our services in “happy path” term, but we underestimate not so happy paths. What if my API is trying to reach another API/system and it is failing constantly? Can I reach it less often in case of timeout? I thought about that in case of a Mule 4 application and I come up with Circuit Breaker pattern. In this article I will briefly introduce the pattern and show you how you use it in your Mule application.