This post originally appeared on medium.
A few weeks ago I was monitoring my phone traffic from a proxy server. While doing that I saw Ola API calls going from my phone (since I was booking a cab).
For those who don’t know about Ola, Ola Cabs is the biggest cab provider in India and also biggest competitor of Uber (again in India). It has raised $500 million in funding, and processes 150,000 bookings a day.
After seeing those flashing binary data going from my system I forgot my weekend project and started tweaking and reverse engineering Ola’s APIs which eventually resulted in breaking their money transaction system. As a result I was able to recharge my Ola wallet with any amount.
For a long time I was thinking about publishing this work on the web, but have been too busy. However, after the response I received from Ola…
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