Use the Java SDK to call Ovok Core from Java 17 or later. The Ovok client signs users in, refreshes their tokens, and exposes FHIR R4, measurements, Slim, Signals, platform, and CMS routes as namespaces. Responses are Jackson 3 JsonNode values, so you can bind them to your own models.

Get started: install, configure, sign in, and read a FHIR resource.
Client configuration: options, session storage, and machine clients.
Errors and retries: exceptions, request options, and retries.
Measurements: save device readings as Observations.
Compatibility: the original OvokClient and requirements.

Each namespace has its own page, starting with authentication, FHIR, patient, and Slim. The API reference lists every class and method; it is generated from the Javadoc.