24 hours to hack the world's simplest API

Ready, set, YO!

$5000 of prizes up for grabs for the best hacks using the Yo API.

All docs can be found at docs.justyo.co

Examples of Yo API integrations can be found at yosubindex.com/challenge/

Yo. It's that simple.

View full rules


$5,000 in prizes

Grand Prize

Most useful hack.

Silver Prize

Most creative hack

Bronze Prize

Most fun hack

Devpost Achievements

Submitting to this hackathon could earn you:


Anyone present at the Yo Headquarters can participate.


  • Submissions needs to be a tested, working, production-grade Yo service, that Yo users can already use in their Yo app.
  • A mini-website that shows the service and explains how to use it and will be linked if and when the service will appear in the Yo Index.


Or Arbel

Or Arbel

Judging Criteria

  • Ease of use
  • Design
  • Usefulness