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Zunder is a FHIR R4/R5 ecosystem built in Rust. At its core is a high performance REST server for healthcare interoperability: CRUD, search, batch and transaction bundles, terminology services, and more. The monorepo also includes a validator, FHIRPath engine, snapshot generator, CLI tools, and Admin UI.
Zunder is under active development. If you encounter issues or spec inconsistencies, please report them on GitHub.

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Why Zunder?

  • Spec compliant: Implements the FHIR REST API with support for versioning, history, compartments, and content negotiation
  • High performance: Written in Rust with PostgreSQL; optimized for low latency and high throughput
  • Extensible: FHIR packages, custom OperationDefinitions, and SMART on FHIR authentication

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Get Started

Quickstart

Get up and running with Zunder in minutes using Docker.

API Reference

Interactive API docs for all FHIR operations.

FHIR Primer

Quick intro to the FHIR standard.

Server Guide

CRUD, search, batch processing, and transactions.

Deployment

Docker, bare metal, and monitoring setup.