Challenge
Duplicate or replayed webhook deliveries
Agnotic approach
Idempotency keys and dedup logic so a re-delivered payload never creates a second reading.
Validic / Terra
Validic & Terra Device-Data Integration
We integrate device-data aggregators — Validic and Terra — so your platform connects to hundreds of wearables and medical devices through one normalized API. Real aggregation engineering: consent, webhooks, and PGHD-to-FHIR pipelines, not just a single connector.
ValidicTerra APIFHIR R4Webhooks
Trusted by global innovators
What device-data aggregation involves
Validic and Terra solve the same core problem: rather than integrating each device vendor's API one by one, you integrate a single aggregator that normalizes hundreds of wearables, CGMs, blood-pressure cuffs, scales, and pulse oximeters into a consistent schema. Both use an OAuth-style patient connection flow, webhook (push) delivery for new readings, and REST endpoints for historical backfill — but their data models, connection flows, and normalization semantics differ, and the choice matters.
The engineering that actually determines success is downstream of the aggregator: idempotent webhook handling, per-patient consent and connection lifecycle, reconciling the aggregator's normalized units against clinical expectations, and mapping the unified stream into FHIR Observations your EHR and analytics can trust. We build that pipeline so multi-device onboarding scales without a per-vendor maintenance burden.
Architecture
See how we turn a single aggregator connection into a clean, consented, multi-device PGHD pipeline.
Common failure modes
Aggregator integration pitfalls — and how we handle them
Challenge
Normalized units hide clinical nuance
Agnotic approach
Unit reconciliation against clinical expectations with UCUM units on every FHIR Observation.
Challenge
Patient device connections silently drop
Agnotic approach
Connection-status monitoring and re-connect prompts so a disconnected device is caught quickly.
Challenge
Aggregator schema changes break mapping
Agnotic approach
A versioned mapping layer isolated from the aggregator so schema shifts are contained.
Validic & Terra APIs We Work With
We build against the exact aggregator surfaces — connection flows, webhooks, and normalized data.
Aggregator connection flows
Validic Connect and Terra's user-connection flow — patient device linking, connection status, and disconnect handling wired end to end.
Multi-device coverage
One integration reaching hundreds of wearables, CGMs, BP cuffs, scales, and pulse oximeters without per-vendor connectors.
Webhook delivery & idempotency
Signed webhook receivers with idempotent processing and replay handling so no reading is dropped or double-counted.
Normalized PGHD → FHIR
The aggregator's unified schema mapped to FHIR R4 Observation resources with correct LOINC codes and UCUM units.
Cross-device analytics
A unified longitudinal record across devices — activity, vitals, glucose, and sleep — for population and cohort analytics.
Where it runs
Aggregator workflows we build
RPM programs
Clinical devices via Validic feeding remote monitoring and billing.
Wellness & fitness apps
Consumer wearables via Terra powering engagement features.
Chronic care platforms
Multi-device vitals for hypertension, diabetes, and heart failure.
Employer wellness
Broad wearable coverage across a member population.
Clinical research
Consented multi-device data for trials and RWE.
Analytics platforms
Unified device data for cohort and population analytics.
Hundreds of devices, one pipeline
Aggregators trade per-vendor effort for a single, well-engineered connection. We make that connection reliable.
1
Integration for hundreds of devices
6–9 wk
Typical aggregator go-live
100%
Idempotent webhook processing
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 robust FHIR-ready 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
Aggregation integration standards
FHIRLOINCUCUMWebhookHIPAA
Our Process
How we deliver aggregator integration
A phased approach that treats aggregator selection, connection flows, and webhook reliability as parallel tracks.
1.
Discovery & Scope
We compare Validic and Terra against your device mix and data needs, then design the connection and consent model.
Aggregator selection
2.
Sandbox & App Registration
Register the aggregator app, wire the connection flow, and validate webhooks against sandbox test data.
Sandbox-validated
3.
Build & Test
Build idempotent webhook handlers, backfill sync, unit reconciliation, and the normalized-to-FHIR mapping.
Idempotent by design
4.
Go-Live & Monitoring
Production go-live with webhook-delivery dashboards, connection-health alerts, and reconciliation reports.
Always monitored
Aggregator table
Validic vs. Terra — how we choose
Both aggregate devices; they differ in emphasis, data model, and delivery.
| Aggregator | Emphasis | Delivery | Notes |
|---|---|---|---|
| Validic | Clinical / RPM devices | Webhooks + REST | Strong on regulated medical devices and RPM programs. |
| Terra | Consumer wearables + fitness | Webhooks + REST | Broad wearable coverage; developer-friendly onboarding. |
| Direct vendor APIs | Single device | Per-vendor | Only worth it when an aggregator lacks a critical device. |
Many platforms use an aggregator as the default and add a direct vendor integration only where needed.
Featured case study
Read Case StudyLera Health: compliant women's health platform
Related proof of compliant, integration-heavy delivery: for Lera Health we built the privacy-first data layer and turned multi-source inputs into personalized insights — the same discipline we apply to normalizing aggregated device data.
Why Partner With Us
15-Minute Scoping CallWhy teams trust us with aggregation
We build aggregator pipelines that scale to many devices without a per-vendor maintenance tax.
Compliance-First by Default
Consent, connection lifecycle, and audit trails built into the aggregator pipeline from sprint one.
Real Device-Data Depth
We know where aggregator normalization helps and where it hides clinical nuance — and we design for it.
Faster Go-To-Market
One aggregator integration unlocks hundreds of devices, collapsing months of per-vendor work into weeks.
Dedicated Product Teams
One accountable team owning connection flows, webhooks, and FHIR mapping end to end.
Frequently Asked Questions
A first production aggregator integration — connection flow, idempotent webhooks, backfill, and FHIR mapping — typically runs 6–9 weeks. Because one integration covers hundreds of devices, most of the effort is in the pipeline, not per-device work.
Ready to connect hundreds of devices through one integration?
Tell us your device mix. We'll recommend Validic or Terra and return a realistic pipeline plan.
contact@agnotic.com
Partnerships
contact@agnotic.com