Withings API review
A free API for apps that need authorized Withings measurements, not a complete tracking suite.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Withings API gives applications access to health measurements from users’ Withings accounts after they authorize sharing. It is aimed at developers and organizations building health, wellness or remote-monitoring workflows around Withings devices. This is an integration layer, not a standalone tracker or a tool for managing studies: users configure and sync their devices in the Withings app, while partner applications retrieve the resulting data through the API. It makes sense when an application needs Withings measurements; teams seeking device-neutral tracking should look elsewhere.
OAuth 2.0 web authorization provides the consent flow, and the API can retrieve current and historical measurements after authorization. Available categories include activity such as steps, distance, calories and workouts; heart rate and HRV; sleep duration and stages; oxygen saturation; temperature; ECG and atrial fibrillation; body composition; and blood pressure. Device compatibility varies by metric, so the exact data available depends on the connected tracker. Notifications and webhooks support updates when new health data arrives, rather than requiring the application to rely only on historical retrieval. The free API is stated for the EU Public Cloud; separate medical-cloud access conditions apply.
Its fit is defined by the Withings ecosystem. Supported trackers include Pulse 0x, Steel HR/Pulse HR, ScanWatch Light, ScanWatch and ScanWatch 2, but not every device supplies every metric. That breadth can serve applications combining activity, sleep and clinical-adjacent measures, while also making device compatibility an important design constraint. The service is cloud-deployed, with ticket support and GDPR and HIPAA compliance listed. Developers should choose it when consent-based integration with Withings devices is central; projects needing broader wearable coverage or a complete tracking and study-management product should consider an alternative.
Withings API pros and cons
- Where it wins
- OAuth 2.0 authorization lets users consent to sharing their data
- Supports current and historical measurements plus webhooks
- Covers activity, sleep, heart, ECG and body metrics, depending on device
- Where it doesn't
- Limited to Withings trackers and device compatibility varies by metric
- Requires users to set up and sync devices through the Withings app
- Free access is stated for the EU Public Cloud; medical-cloud conditions differ
Withings API fact sheet, pricing and score →
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