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Fitbit Developers oversee the SDK and API forums. We're here to answer questions about Fitbit developer tools, assist with projects, and make sure your voice is heard by the development team.
At this time, we do not have any products or APIs that show HRV and stress level data. I'd recommend posting a suggestion on the Feature Suggestion board.
Best,
Gordon
Gordon Crenshaw Senior Technical Solutions Consultant Fitbit Partner Engineering & Web API Support | Google