If you’re a developer, civic hacker, or just have a really good idea and want to connect with like-minded innovators, you’ve come to the right place.

  • Access a variety of City data via Application Programming Interfaces (APIs) to build tools that engage and serve Chicago’s diverse community.
  • Connect with other developers and community members.
  • Get answers to your questions about the City’s APIs and other data resources.

Have an idea for an application or visualization?
Use our open and standards-based APIs to build it.

Tutorials and Other Resources
Feedback and Support
Are you creating an application or visualization using the City’s data? You can post ideas or questions to the Developers Forum (coming soon), email us at developers(at)cityofchicago(dot)org, or contact us on Twitter @ChicagoCDO
Share →