As it appears this thread hasn’t had much activity I’d like to ask if there has been any further discussion RE: APIs in Health data? I’m particularly interested in the HumanAPI concept as I just recently submitted a similar idea (called myAPI) to the “Wearables in Healthcare Pilot Challenge”.
Human API (like Validic and OpenMHealth) helps retrieve data from popular fitness trackers. But if you are planning to build your own Open Source PHR, that’s the easy part 