Documentation
Build against the FHIR APIs
Resource specs, operation reference, a live sandbox, and operational status — everything a third-party developer needs to ship.
Sections
Resource browserFHIR API Docs
Every FHIR resource the Patient Access and Provider Directory APIs return. Each entry shows must-support fields, source profile, and a copy-pasteable example.
30 resources · US Core 6.1.0 · CARIN BB 2.2.0 · PDex STU 2.1.0 · Plan-Net 1.2.0Open →Operation referenceSwaggerBrowse every API as a structured operation list. Expand any operation to see parameters, request bodies, and example responses — and hit it live against the sandbox.
OpenAPI 3.1.0 · 5 specs · Live try-it-outOpen →Try it liveSandboxPick a preset, hit Send, and inspect the response against CMS synthetic patients. No PHI, no production review needed. Rate limit 100 req/min.
Synthetic data · 14,200 patients · USCDI v3Open →OperationalAPI StatusLive availability and latency for every FHIR API surface. 30-day uptime rollups update every 5 minutes; recent incidents posted with severity.
99.96% uptime · P95 1.2s · 0 active incidentsOpen →