Open source universal API for QS data

Hey QS!

As we started out making a Quantified Self app ourselves, @celsinga and I wanted to share our new open source Health Devices API which we just launched as it may be useful to other QS devs in this community. It allows you to gain access to your users’ health data from various wearables, RPM devices, and mHealth apps. You can check out the public Github repo (and give us a star if you like what you see :star:)!

We wished an open source product like this existed when we were making our QS app, so we wanted to share it here as well. For developers in the healthtech space, building integrations to various sources of healthcare data is a huge pain, as it means wrangling different data formats, gaining access to the APIs in the first place, and ultimately spending precious developer resources building out data pipelines. We solve this pain for you through our single open source API, which is quick and easy to get started with.


Out of the box, our Health Devices API supports the following integrations:

  • Fitbit
  • Oura
  • Whoop
  • Withings
  • Cronometer

With these initial integrations, we plan to add many more to this list, including Garmin, Apple Health, and Google Fit in the near term. If there’s an integration you need that’s not currently on roadmap, we’re more than happy to add it and build it into our API (contact us at Because we’re also open-source, you can also just fork our code and build your own custom integrations!

Getting Started

The easiest way to get started is to follow our quickstart guide in our dev docs.

Would love to get some feedback from the QS community about the API so we can improve it, and thanks in advance!


It’s great to see an open-source competitor to Validic and Human API, this is overdue…

But please tell me you’re not returning all timestamps in UTC :crazy_face: