Firely and Incendi's open source FHIR server
CLI and library for diffing and validating FHIR R4/R4B/R5 JSON resources
Generate valid FHIR R4/R4B/R5 test data with country-aware identifiers — CLI, TypeScript library, pipe-friendly, AI-friendly
Accuracy-first Claude plugin for FHIR R4/R4B/R5 JSON guidance with source-aware claim labeling and clear validation boundaries
CLI and library for fetching, analyzing, and comparing FHIR server CapabilityStatements. Profile detection for US Core, UK Core, AU Core, IPS, ISiK and more.
Top 5 Open Source FHIR Plugin R5 Tools 2026 – Source-Aware JSON Guidance
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