Something similar to Burp's repeater. I know as of now, it might sound like re-inventing the wheel and that too a pretty bad one compared to it's evolved offsprings, but this is just a part of a bigger project that would aim at automating mobile appsec assessments.
For now to be able to use the repeater, all you need is mimtproxy python module installed. Once you are there, install the mitmproxy certificate in your real/emulator mobile device. Kickoff the script and start playing around with it. The script itself is pretty verbose. Once the script is running, you can start off any app on your device and all the requests you make through that app, will be logged in your current working directory (which can be later read directly as well). Once done, pass on a Ctrl+C interrupt to the script and follow the verbose comments.
The main entry point to the script is my_repeater.py
In case a DB functionality is needed to save the repeater logs etc. pyRepeat.py is the entry point.