Useful tip for Expo and Android developers 🤯 #MITM I just discovered it today and I felt like I needed to share this technique. I'm helping a client of mine to migrate 2 native apps, both developed for iOS and Android, so a total of 4 apps (2 iOS and 2 Android) to a new single app made with @expo . We're still experimenting with what can be done and reused. Mostly for the REST api and authentication. I'm using RTK Query for the communication with the server, because it works even better than tanstack react query in my opinion for an existing REST api. Anyway, I spent way too much time trying to send a POST request, exactly like it seems to be done in kotlin using Retrofit. But for a reason I can't understand, it doesn't work like in the existing android app I have running on my device. I start to feel frustrated and wonder if I could get the data sent by the existing production app on android, to see what is different from what I'm sending. That's how I discovered that, to see https requests content from a production app I needed to root my AVD emulator and then do some MITM. Something I never did before. I found this nice blog post explaining how to root an AVD emulator and install Magisk: 8ksec.io/rooting-an-android-… After I rooted my emulator, I installed the HTTP Toolkit mobile app @HttpToolkit and on my MacBook, and then I targeted my client existing production mobile app using Frida. And that way I could compare super easily the requests content from the one I was sending in my expo, and the UI is super easy to read. For a reason I couldn't understand yet, something that was supposed to be named "recipe" was named "importRecipe" in the body request. It wasn't obvious reading the kotlin code, even @cursor_ai couldn't see it. But finally, problem solved ✅ I think I'm gonna use this tool regularly from now on.