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Documentation Hub

Platform Architecture

APEX Nexus is a GPID-centered healthcare platform — API gateway, FHIR data lake, developer portal, and integrated product lines on GCP Cloud Run.

15

OpenAPI Specs

355+

FHIR Resource Types

5

Compliance Frameworks

30

Data Domains

Domain map

Partner Portal

developers.parkerapex.com

Signup, login, docs, API keys, OAuth, pipeline (replaces cms.prod)

APEX Nexus Gateway

api.parkerapex.com

Production REST + FHIR R4, OAuth, partner APIs

Sandbox API

sandbox.api.parkerapex.com

Synthetic data, same contracts, relaxed rate limits

FHIR Data Lake

lake.parkerapex.com

HAPI R4 longitudinal store, bulk export, GPID master

Architecture layers

Presentation

  • •Next.js developer portal
  • •React product command centers
  • •SMART on FHIR apps

API Gateway

  • •Modular API gateway
  • •OAuth 2.0 + SMART
  • •GPID boundary enforcement

Clinical Data

  • •HAPI FHIR R4 (lake)
  • •PostgreSQL transactional store
  • •BigQuery analytics views

Identity

  • •Plexus IAM
  • •GPID resolver (SHA-256)
  • •Tenant-scoped RBAC

Infrastructure

  • •GCP Cloud Run (us-east4)
  • •Cloud Build + GitHub Actions
  • •Terraform IaC

Data flow

Partner / Product → GPID resolve → OAuth scope check → API gateway → outbox → HAPI lake → read-back (Horizon, Pulse, Catalyst)

Nexus Platform Hub →FHIR Data Lake →GPID Boundary →

Partner architecture references

GPID Boundary Contract

Required headers, enforcement rules, valid formats

Security & Auth Reference

OAuth, SMART on FHIR, JWT, MFA, RBAC

Compliance Frameworks

HIPAA, SOC 2, HITRUST, ISO 27001 mappings

FHIR Data Lake

HAPI R4 store, ingest pipeline, bulk export

Internal engineering runbooks