FHIR API R4
Payer Data Exchange (PDex) API is built and supported using Fast Healthcare Interoperability Resources (FHIR) version R4 (4.0.1).
API Specification
The Payer Data Exchange (PDex) API is fully described in an OpenAPI 3.0 compliant document. OpenAPI is a standard specification for describing APIs. OpenAPI descriptions allow both humans and machines to discover the capabilities of an API without needing to first read documentation or understand the implementation.