NIP-101h Health and Fitness Data Framework: Interoperable, Private Health & Fitness on Nostr

Imagine a world where your favorite health and fitness apps—diet trackers, meditation tools, cardio and strength training platforms, even therapy apps—can all work together seamlessly. Not because they're owned by the same company, but because they speak a common, open language. That's the future NIP-101h is building on Nostr.

A Modular, Privacy-First Health Data Framework

NIP-101h defines a modular, privacy-first framework for sharing granular health and fitness metrics on the decentralized Nostr protocol. The core idea is simple but powerful: every health metric (weight, steps, calories, mood, and so on) gets its own unique Nostr event kind. Apps can implement only the metrics they care about, and users can choose exactly what to share, with whom, and how.

This modular approach means true interoperability. A meditation app can log mindfulness sessions, a running app can record your daily mileage, and a diet tracker can keep tabs on your nutrition—all using the same underlying standard. Each app remains independent, but your data becomes portable, composable, and, most importantly, under your control.

Why NIP-101h Matters

Interoperability

Today's health and fitness apps are walled gardens. Data is locked away in proprietary formats, making it hard to move, analyze, or combine. NIP-101h breaks down these barriers by providing a common, open standard for health metrics on Nostr. Apps can collaborate, users can migrate, and new services can emerge—without permission or lock-in.

User Control & Privacy

Health data is deeply personal. That's why NIP-101h is privacy-first: all metric values are encrypted by default using NIP-44, unless the user explicitly opts out. You decide what's public, what's private, and who gets access. Even if you want to keep everything local, that's supported too.

Extensibility

The world of health and fitness is always evolving. NIP-101h is designed to grow with it. New metrics can be added at any time via the