
Build smarter products with connected health data
The scalable platform for companies to connect to all types of wearable, sensor, app and blood data.
Terra API connects apps to health and fitness data from Garmin, Fitbit, Apple Health, Google Fit, Oura, WHOOP, Polar, Eight Sleep, Strava, Withings, Samsung Health, Cronometer, MyFitnessPal, Suunto, Wahoo, and 50+ additional providers through a single integration.
Terra API supports activity, sleep, nutrition, heart rate, HRV, VO2max, body metrics, menstrual cycle, and continuous glucose monitoring (CGM) data types.
Terra is HIPAA compliant and SOC 2 certified. Data is encrypted in transit and at rest. Terra is trusted by health apps, clinical research teams, insurance companies, and corporate wellness platforms.
Terra was founded in 2020 by Kyriakos Eleftheriou and is a Y Combinator W21 company.
Integrations
Connect your app to your users’ sensors, wearables, apps, and biomarkers, all through one unified API. Get unlimited access to all types of integrations, no backend work needed.
10+ features loved by
engineering teams
Help people connect their health data in a way that feels natural in your product, while your team spends less time wiring and maintaining one-off integrations.
Authentication
People can link Apple Health, Fitbit, Garmin, Oura, Samsung Health, and hundreds of other apps and devices through one embeddable Terra API flow that matches your brand, fonts, and layout so onboarding feels like part of your product.
Terra handles OAuth, token refresh, and provider-specific edge cases behind the scenes, which means faster launches, fewer auth regressions, and more roadmap time for features your users notice.
Authentication
People can link Apple Health, Fitbit, Garmin, Oura, Samsung Health, and hundreds of other apps and devices through one embeddable Terra API flow that matches your brand, fonts, and layout so onboarding feels like part of your product.
Terra handles OAuth, token refresh, and provider-specific edge cases behind the scenes, which means faster launches, fewer auth regressions, and more roadmap time for features your users notice.
- Authentication (Auth widget)
People can link Apple Health, Fitbit, Garmin, Oura, Samsung Health, and hundreds of other apps and devices through one embeddable Terra API flow that matches your brand, fonts, and layout so onboarding feels like part of your product.
Terra handles OAuth, token refresh, and provider-specific edge cases behind the scenes, which means faster launches, fewer auth regressions, and more roadmap time for features your users notice.
- Streaming (Streaming)
Surface live heart rate, steps, distance, and other session signals while someone is moving so coaching cues, safety alerts, and intensity dashboards stay in sync with the wearable on their wrist.
Terra moves streaming data from the device through your mobile app to your backend with low latency and hosts the broker in the middle, so your team spends less time on Bluetooth plumbing and more time on the product experience.
- Mobile SDK (Mobile SDK)
Pull Apple Health on iPhone, Samsung Health on Galaxy, and Google Fit through Health Connect when the data never appears in a vendor cloud API your servers can call directly.
Ship native iOS and Android experiences, plus React Native and Flutter, with familiar permission prompts and optional background delivery so summaries and vitals land in your app soon after someone unlocks their phone.
- Data Deduplication (Data Deduplication)
When a workout or night of sleep is logged on a watch, a phone, and a third-party app, charts should still show one clean event. Terra merges overlapping records so streaks, PRs, and recovery scores reflect what really happened.
Downstream analytics, ML features, and executive reporting stay trustworthy because you are not maintaining bespoke merge logic for every pair of wearables and apps.
- Data Simulator (Data Simulator)
Generate realistic activity, sleep, and vitals samples when you need a believable demo, a sales call, or a design review and the right hardware is not in the room.
Exercise staging pipelines and automated tests against Terra webhooks and dashboards without buying every device or babysitting fragile sandbox accounts, so regressions show up before members do.
- Data backfills (Data backfills)
When a member connects a wearable, app or health system, Terra can retrieve weeks or months of past workouts, sleep, and biometrics so trends, baselines, and coaching insights make sense from day one.
You avoid one-off import scripts, brittle CSV jobs, and surprise API changes that stall onboarding projects while users wait for history to appear.
- Workout Plans (Workout Plans)
Push structured runs, rides, swims, and strength blocks to Garmin, Hammerhead, Coros, TodaysPlan, and other supported platforms so athletes open the workout on the watch or head unit they already trust instead of retyping intervals by hand.
Apple Watch users also receive the same style of plan through the Terra mobile SDK, which keeps Apple and multi-brand coaching products on one Terra API workflow.
- Team sports (Team sports)
Give coaches and performance staff one Terra API view of GPS, force plates, strength tests, and motion data tied to each athlete on the roster so load, readiness, and return-to-play decisions do not depend on scattered CSV exports.
Terra supports elite lab and field systems such as Catapult and GymAware alongside other common trackers, with the same dependable webhook delivery model you already use for consumer wearables.
- Destinations (Destinations)
Point Terra at the HTTPS endpoints you already operate so every new workout, sleep summary, nutrition log, body metric, and auth update arrives as a signed webhook your warehouse, queue, or app server can ingest immediately.
Built-in retries, chunked deliveries for large history pulls, and a dashboard payload simulator help teams harden production and staging pipelines before millions of members depend on them.
- Data normalization (Data normalization)
Garmin, Fitbit, Oura, Samsung Health, and hundreds of other health data sources each speak their own dialect of steps, sleep stages, and heart rate. Terra normalizes them into one predictable Terra API schema so your product receives clean, consistent data that is device and system agnostic.
When Terra adds or updates a connector, your dashboards and models keep working because field names, units, and enums are maintained centrally instead of copied into every service.
- FIT files and FHIR (FIT files and FHIR)
Bring rich ride and run detail from bike computers and watches through FIT, and pair it with FHIR-friendly summaries when hospitals, payers, or research partners expect healthcare-grade interoperability.
Terra keeps parsing and profile mapping next to the same models that power consumer apps, which shortens compliance reviews and partner onboarding compared with building a second stack from scratch.
Access elite team performance data
Modern teams use dozens of performance platforms like force plates, GPS, strength testing, motion tracking. Terra's Teams API turns that fragmented ecosystem into one clean, programmable layer.
Team data in one view
Get one clean view of athletes, tests, and sessions, even when teams use different tools. We guarantee fewer 'which numbers are right?' moments.
Monitor team workloads
Aggregate training session load and performance metrics in real time. Help coaches to spot individual team trends or risky patterns early.
Build athlete dashboards
Build dashboards and longitudinal views once and keep them working as teams change platforms. All data remains consistent through our unified schema.
Build research pipelines
Build longitudinal analysis, cohort studies, and modeling with clean, consistent data. Same schema today, same schema next year.
Ship reports to coaches
Webhooks push updated performance and session data straight into your reporting pipeline. Coaches get timely, consistent reports.
Centralize athlete data
Each athlete exists once, even if the team uses multiple platforms. You can link them to your internal IDs, manage status centrally, and avoid duplication or drift.
Why security teams love us
Terra API was built from the ground up with privacy and security at its core. Every data flow from wearable to API is encrypted, monitored, and isolated across environments. Our compliance with GDPR, HIPAA, and SOC 2 ensures that your users’ most sensitive health data is always handled according to the highest global standards.
Frequently Asked Questions
- What is Terra API?
- Terra is a health and fitness data API that gives developers a single integration to connect apps with wearables, health apps, medical devices, and sensors. One API call returns standardised data from 500+ providers — including Garmin, Fitbit, Apple Health, Oura, WHOOP, and Strava — without writing separate authentication flows or data parsers.
- What health data sources does Terra support?
- Terra connects to 500+ health data sources including wearables (Garmin, Fitbit, Apple Watch, Oura Ring, WHOOP, Polar, Samsung Health, Withings, Suunto, Wahoo), fitness apps (Strava, MyFitnessPal, Cronometer), blood testing providers, CGM devices, medical devices, and sensors.
- What types of health data does Terra provide?
- Terra provides 5,000+ standardised health metrics including granular sleep stages and latency, workouts and activity, nutrition, heart rate, HRV, VO2max, blood oxygen (SpO2), continuous glucose monitoring (CGM), menstrual cycle, and body composition. Full data type reference is available at docs.tryterra.co.
- Is Terra HIPAA and GDPR compliant?
- Yes. Terra is HIPAA compliant, GDPR compliant, and SOC 2 Type II certified. All health data is encrypted in transit and at rest. Terra is built for healthcare applications, clinical research, insurance, and enterprise health platforms.
- How does Terra API pricing work?
- Terra uses usage-based pricing — you only pay for the active users you have. Plans start at $399 per month on the annual plan. All data types and integrations are included with no per-endpoint fee.
- Do I need to build separate integrations for each wearable?
- No. Terra's single API normalises data across all 500+ supported providers. Integrate once and gain access to data from Garmin, Fitbit, Apple Health, Oura, WHOOP, Strava, and hundreds more with a consistent data schema regardless of source.
- Does Terra support real-time health data streaming?
- Yes. Terra's WebSocket Streaming API delivers real-time sensor data — such as beat-by-beat heart rate — from wearable devices to your application, enabling live biometric dashboards and continuous monitoring.






























