HL7 Application Programming Interface (HAPI)
Powering FHIR® Connectivity with HAPI

HAPI (HL7 Application Programming Interface) FHIR® is an open-source Java library designed to simplify the implementation of FHIR messaging in applications. It provides developers with the tools to create, parse, validate, and transmit FHIR data, making it easier to integrate healthcare systems and enable seamless data exchange.
External Solutions for API Integration
Open source integration tools useful for healtlh IT integration projects.
HAPI for HL7 v2 messages is an open-source, object oriented HL7 v2.x parser developed for the Java platform
HAPI FHIR is a simple-but-powerful library for adding FHIR messaging to your application. It is pure Java compatible and licensed under the business-friendly Apache Software License, version 2.0.