How to reverse engineer 3rd party mobile API calls with Postman

Introduction

Long story short… I have a heat pump that I can control via an app. At the end of the day, there is no official documentation on how I can directly (without the app) communicate to my heat pump. So I embarked on a journey to reverse engineer the API connectivity and see how I could tweak this. For those curious, my end goal I have in mind is to align the heat pump to the production of my solar installation. Or just call me a technical nutcase, that also works. 😉

 

Setup

For today’s post, I will show you how you can combine the native proxy function of your iOS device to route to Postman. Where you can then start tracing the API calls made by a native mobile application. Makes sense so far? Cool! Let’s get to it!