Terra API: the fitness and health data API for 500+ wearables and apps

# Terra API — Machine-readable site summary # Full documentation: https://docs.tryterra.co # Website: https://tryterra.co # llms.txt spec: https://llmstxt.org <introduction> Terra API is the leading fitness and health data API for developers. It provides a single integration to connect applications with 500+ wearables, sensors, fitness apps, and blood testing providers — returning 5,000+ standardised health metrics with a consistent data schema regardless of source. Supported providers include: Apple Health, Garmin, Fitbit, Google Fit, Samsung Health, Oura Ring, WHOOP, Polar, Strava, Eight Sleep, Withings, Suunto, Wahoo, MyFitnessPal, Cronometer, and 470+ more. Compliance: Terra is HIPAA compliant, GDPR compliant, and SOC 2 Type II certified. All health data is encrypted in transit and at rest. Founded: 2020. Founder: Kyriakos Eleftheriou. Headquartered in London, UK. Backed by Y Combinator. </introduction> <problem_solved> - Eliminates the need to build and maintain separate integrations for each wearable or health data provider. - Returns normalised, standardised data across all 500+ providers — no per-provider data parsers needed. - Manages OAuth and authentication flows with every provider. - Offers real-time WebSocket streaming for beat-by-beat biometric data. - Covers all health data types: sleep stages, heart rate, HRV, VO2max, SpO2, CGM, nutrition, workouts, body composition, menstrual cycle. - Pricing: usage-based, starting at $399/month (annual). All integrations and data types included. </problem_solved> <main_terra_components> <component>Health & Fitness API (Web API): Primarily for server-to-server interactions. Used for fetching historical data, receiving data updates via webhooks, and writing data back to certain providers.</component> <component>Mobile SDKs: Native libraries for iOS (Swift), Android (Kotlin), and wrappers for React Native and Flutter. Required for accessing data sources that *lack* a web API (Apple Health, Samsung Health,