Challenge
Missed callbacks lose clinical readings
Agnotic approach
We pair Notify callbacks with scheduled back-fill so no measure is silently dropped.
Withings
Withings Integration Services
Remote monitoring programs need home blood pressure, weight and sleep readings to reach clinicians promptly and correctly coded. We build the Withings API connection end to end (OAuth2 consent, device measures and change notifications) mapped into FHIR Observations through a HIPAA-ready pipeline.
Withings APIOAuth2FHIR R4HIPAA-Ready
Trusted by global innovators
What is the Withings API used for?
The Withings API gives apps access, with each user's consent, to health data from Withings devices such as blood pressure monitors, smart scales and sleep sensors. It suits remote patient monitoring and wellness programs. Agnotic Technologies builds the OAuth2 connection, the webhook handling and the pipeline that maps each reading into your platform.
Withings makes cellular and Wi-Fi blood-pressure monitors, body-composition scales and sleep sensors that upload without a phone, which suits remote patient monitoring. The Withings API uses OAuth2, with a Measure endpoint for vitals and Notify subscriptions that push updates when a device syncs.
The RPM context raises the bar: blood pressure, weight and sleep measures are clinically actionable, so timeliness, units and de-duplication matter. The pipeline handles Notify callbacks, back-fills missed measures and maps each reading to a FHIR Observation with the right LOINC code and UCUM unit.
How do Withings readings reach your platform?
A pipeline from Withings connected devices to a FHIR-native record for remote patient monitoring.
Common failure modes
Where do Withings integrations break?
Challenge
Wrong units reach the clinical record
Agnotic approach
Deterministic UCUM unit mapping and validation before data hits the FHIR store.
Challenge
Re-delivered callbacks double-count measures
Agnotic approach
De-duplication keyed on measure identity keeps the record accurate.
Challenge
Refresh tokens expire and break device sync
Agnotic approach
Reliable token rotation and re-consent flows so RPM patients don't silently drop off.
Which Withings API services and standards do we use?
The exact Withings API surface your integration rides on.
Withings Measure API
Blood pressure, weight, body composition, heart rate, and sleep measures from connected devices.
Notify Subscriptions
The Withings Notify mechanism pushes callbacks when a device syncs new data, reconciled against pulls.
OAuth2 & Scopes
Authorization Code flow with scoped consent and refresh-token rotation for ongoing device access.
Cellular & Wi-Fi Devices
Support for phone-free cellular and Wi-Fi devices ideal for less tech-savvy RPM patients.
FHIR Observation Mapping
Each measure mapped to FHIR R4 with the correct LOINC code and UCUM unit for clinical use.
Back-Fill & De-Dup
Recover missed measures and de-duplicate re-delivered callbacks so the record stays accurate.
Where it runs
Withings workflows we ship
Hypertension RPM
Home blood-pressure readings feeding an RPM dashboard and alerts.
Heart-failure programs
Daily weight trends flagging fluid retention early.
Metabolic & weight care
Body-composition trends tied to care-plan goals.
Sleep programs
Sleep-sensor data driving coaching and intervention.
Clinical research
Consented device measures for study endpoints.
Chronic care
Multi-measure monitoring across a patient population.
What makes Withings data RPM-ready?
Withings' cellular devices suit RPM: the value is timely, correctly coded FHIR data.
BP + Scale
Core RPM measures we ingest
Webhooks
Notified when new readings arrive
FHIR R4
Each measure as a coded Observation
Compliance-First Healthcare App Development Services Backed by Global Standards
15-Minute Scoping Call01
HIPAA
Health Insurance Portability and Accountability Act
Protect PHI with privacy-first architecture, encrypted storage and transmission, strict access controls, and traceable audit logs.
02
GDPR
General Data Protection Regulation
Implement lawful consent flows, data minimization, retention controls, and secure processing for sensitive health data.
03
FHIR
Fast Healthcare Interoperability Resources
Enable standardized health data exchange across apps, care teams, and systems through standards-based FHIR APIs.
04
HL7
Health Level Seven International
Support enterprise-grade interoperability with HL7-based integrations for records, events, and clinical messaging workflows.
05
HITRUST
Health Information Trust Alliance
Align security programs to healthcare-specific control and risk management practices trusted by providers and ecosystem partners.
06
HITECH
Health Information Technology for Economic and Clinical Health Act
Design with breach notification readiness, digital record safeguards, and operational controls that support regulated care programs.
07
SaMD
FDA Software as a Medical Device
Plan software quality, traceability, and documentation pathways for products that may require SaMD review and submission.
08
MDR (EU)
Medical Device Regulation (European Union)
Prepare EU market-ready processes for risk classification, evidence tracking, and lifecycle governance under MDR expectations.
09
SAMHSA
Substance Abuse and Mental Health Services Administration
Apply confidentiality controls and consent-aware sharing models for behavioral and mental health data experiences.
Standards we build against
Which standards apply to Withings data?
FHIROAuth2LOINCUCUMHIPAA
Our Process
How does Agnotic build a Withings integration?
A phased approach across app registration, OAuth2, and FHIR mapping.
1.
Discovery & Data Scope
We map the Withings devices and measure types your RPM program needs and their FHIR targets.
Privacy-first design
2.
App Registration & OAuth2
Register the Withings app, configure scopes and redirect URIs, and build the Authorization Code flow.
Consent-aware
3.
Build & Test
Measure pulls, Notify callbacks, back-fill, and FHIR mapping validated against test devices.
Always audit-ready
4.
Go-Live & Monitoring
Phased rollout with callback-health and reconciliation monitoring once live.
Smooth data exchange
Data model
Which Withings data fits your program?
Withings' Measure and Notify surface shapes the integration.
| Data | Endpoint | Access | Notes |
|---|---|---|---|
| Blood pressure | Measure API | OAuth2 scope | Systolic, diastolic, and pulse readings. |
| Weight / body comp | Measure API | OAuth2 scope | Weight, fat mass, and composition. |
| Sleep | Sleep API | OAuth2 scope | Sleep stages and duration from sleep sensors. |
| Notifications | Notify subscription | Callback | Push on device sync; reconcile against pulls. |
Cellular and Wi-Fi devices upload without a phone, which is why timely callback handling matters for RPM.
Facts and sources
Withings API facts and sources
Each fact below links to Withings' own developer documentation.
In the Withings OAuth 2.0 web flow, an application has 30 seconds to exchange the authorization code for an access token and a refresh token.
Source: Withings developer guide, OAuth web flowOnce a user authorizes an application, it can access both new data and all historical health data collected by the user's Withings devices, and Withings' webhook system notifies it when new data is available.
Source: Withings developer guide, OAuth web flowThe Withings Public Health Data API is designed for individuals and partners without a formal contract, and users rely on the Withings mobile app to install and sync their devices.
Source: Withings developer guide, Public Health Data API overviewWithings cellular devices transmit collected health data to Withings' servers over the cellular network without Wi-Fi or Bluetooth, with a Wi-Fi or Bluetooth fallback for cellular dead zones.
Source: Withings developer portal, Cellular Solution
Featured case study
Read Case StudyLera Health: compliant women's health platform
Related proof of compliant, integration-heavy delivery: the privacy-first data layer we built for Lera Health reflects the discipline we bring to ingesting Withings blood-pressure, weight, and sleep measures into a compliant FHIR record.
Why Partner With Us
15-Minute Scoping CallWhy bring your Withings work to Agnotic?
We ship Withings integrations built for the timeliness RPM demands.
Compliance-First by Default
HIPAA, OAuth2 consent, and clinical-grade unit handling designed in from sprint one.
RPM & PGHD Depth
We know Withings' Measure and Notify surface and its FHIR mapping, no ramp-up on your budget.
Faster Go-To-Market
App registration, OAuth2, and FHIR mapping run in parallel toward a live integration.
Dedicated Product Teams
One accountable team across backend engineering, FHIR, and compliance.
Frequently Asked Questions
It depends on how many device and measure types you ingest, whether you need RPM alerting, how much history you back-fill, and whether you use cellular devices shipped to patients. We scope against your exact devices and program.
Cost scales with how many device and measure types you ingest, whether you need alerting, and the depth of FHIR mapping and RPM logic. We share an estimate after a scoping conversation.
Withings' Public Health Data API is designed for individuals and partners without a formal contract: you create a developer account and register an application for OAuth2 credentials. We handle registration, scopes, webhook setup and the consent flow as part of the build.
Yes. We stream blood pressure, weight and sleep readings into your RPM dashboard, EHR or clinician workflow, mapped to FHIR R4 Observations with LOINC codes and UCUM units so they are clinically usable.
Yes. A first release covers one workflow, such as home blood pressure readings flowing into one program's monitoring dashboard, with the consent flow, notifications and back-fill that workflow needs. More devices and programs follow in later releases.
AI tools help our engineers draft code and tests, but a person reviews every change, and it passes the same automated tests and security checks as any other code. Which tools may see your code or data is agreed with you at the start.
Withings cellular devices send readings over the cellular network without Wi-Fi, Bluetooth or a paired phone, which removes a setup step for patients. We build the pipeline to capture those uploads promptly and map them to FHIR.
Ready to bring Withings device data into your platform?
Tell us the devices and use case. We'll return a plan covering OAuth2, notifications, back-fill, and FHIR mapping.
contact@agnotic.com
Partnerships
contact@agnotic.com