Firely

Firely is an Amsterdam-based health IT company and one of the original co-developers of the HL7 FHIR (Fast Healthcare Interoperability Resources) specification. Co-founded by Ewout Kramer and Martijn Harthoorn (both long-time HL7 FHIR core team members), Firely builds the canonical FHIR toolchain used by payers, providers, health authorities, and digital health vendors worldwide. The Firely platform is anchored by Firely Server (formerly Vonk) — a certified production-grade FHIR server with native support for MongoDB and SQL Server, deployable on Windows, Linux, macOS, Docker, and Kubernetes across on-premise, Azure, AWS, and Google Cloud. Firely Server is G10, ONC, and ISiK certified and supports SMART on FHIR, Bulk Data, CDS Hooks, Subscriptions, Terminology Services, and FHIR Mapping. The product family also includes Simplifier.net (the global FHIR profile registry and package server hosting ~9,000 projects, 40,000+ profiles, and 1,600+ implementation guides), Forge (FHIR profile editor), Firely Terminal (command-line FHIR tool with FQL/FSH/FHIRPath support), the open-source Firely .NET SDK (the de-facto reference C# FHIR library), the firely-cql-sdk for Clinical Quality Language, the Firely Validator API, FHIR Facade, Firely Server Ingest, and Firely Auth. Customers include UCSF, Humana, Roche, NHS, Opala, and the World Health Organization. Firely does not operate a hosted multi-tenant FHIR-as-a-service offering with a public REST endpoint; customers run Firely Server in their own environments. The public developer surface is therefore the Firely software products (Firely Server, .NET SDK, Terminal), the Simplifier.net package and registry APIs, and the open HL7 FHIR REST API contract that every Firely Server instance implements.

2 APIs 25 Features

FHIRHL7HealthcareHealth ITInteroperabilityClinical DataFHIR ServerVonkSimplifierForgeTerminologySMART on FHIRBulk DataCDS HooksImplementation Guides.NET SDKCQLProfile Registry

APIs

Simplifier.net FHIR Package API

The Simplifier.net FHIR Package API serves every publicly published FHIR package — including packages from Simplifier.net, HL7 International, and other public feeds — and is the...

Firely Server FHIR REST API

Every Firely Server (formerly Vonk) instance exposes the standard HL7 FHIR REST API contract — type-level and instance-level CRUD, search, history, batch/transaction, capability...

Collections

Simplifier.net FHIR Package API

OPEN

Features

Firely Server (Vonk) — certified production FHIR server supporting FHIR R4, R4B, R5, and STU3

G10, ONC Health IT, and ISiK (German interoperability) certifications

MongoDB and SQL Server storage backends with flexible schemas

Deployment on Windows, Linux, macOS, Docker, and Kubernetes via official Helm Charts

Cloud-portable across Azure, AWS, Google Cloud, on-premise, and hybrid

Native FHIR validation against profiles, extensions, and value sets

SMART on FHIR authentication and authorization (latest version)

Bulk Data Access ($export) for population-scale data exchange

Terminology Service module ($validate-code, $expand, $lookup, $translate)

FHIR Mapping Language engine and CDS Hooks support

Subscriptions and PubSub for event-driven workflows

Custom search parameters, conformance resources, and request/response interception

Encryption at rest and in transit; event logging enabled by default

Firely .NET SDK — official open-source C# FHIR library (de-facto reference SDK)

Firely CQL SDK — Clinical Quality Language execution engine for .NET

Firely Terminal — CLI for FHIR validation, FQL, FSH compilation, FHIRPath, package management

Simplifier.net — global FHIR registry hosting 9,000+ projects and 40,000+ profiles

Forge — desktop FHIR profile editor integrated with Simplifier

Firely Validator API — standalone FHIR resource validation service

FHIR Facade — adapter for exposing non-FHIR backends through a FHIR API

Firely Server Ingest — high-volume FHIR data ingestion pipeline

Firely Auth — SMART-on-FHIR-compatible authentication component

Co-developers of HL7 FHIR (founders Ewout Kramer and Martijn Harthoorn on FHIR core team)

Customers include UCSF, Humana, Roche, NHS, WHO, and Opala

FHIR consulting, training (profiling, SDK, quality measures), and implementation services

Resources

Documentation

Documentation

Documentation

Documentation

Documentation

GitHubOrganization

GitHubOrganization

CodeExamples

CodeExamples

CodeExamples

CodeExamples

CodeExamples

CodeExamples

CodeExamples

Documentation

Sources

opencollection: 1.0.0
info:
  name: Simplifier.net FHIR Package API
  version: 1.0.1
items:
- info:
    name: Search FHIR packages
    type: http
  http:
    method: GET
    url: https://packages.simplifier.net/catalog
    params:
    - name: name
      value: ''
      type: query
      description: Search by (part of) a package name
    - name: version
      value: ''
      type: query
      description: Search for packages with a version containing this term
    - name: canonical
      value: ''
      type: query
      description: Search for packages or resource contained in it with this term in their canonical
    - name: pkgcanonical
      value: http://hl7.org/fhir/us/core
      type: query
      description: Search for packages with this exact canonical
    - name: fhirVersion
      value: ''
      type: query
      description: Limit search by FHIR version
    - name: prerelease
      value: ''
      type: query
      description: Whether to include or exclude prerelease package versions
  docs: 'Search for FHIR packages by name, canonical and other attributes.

    * Can be used for populating intellisense dropdowns for package search.

    * Does not intend to follow NPM in all aspects and adds extra FHIR specific searches, like canonicals and FHIR versions.


    Known limitations:

    * Packages from which all versions are marked as `unlisted` are not returned.

    * The attribute names of the return value are documented here as camelCase, but are in fact currently PascalCase.

    '
- info:
    name: List package versions.
    type: http
  http:
    method: GET
    url: https://packages.simplifier.net/:package-name
    params:
    - name: package-name
      value: hl7.fhir.us.core
      type: path
      description: Name of the package
  docs: 'Endpoint to retrieve all versions for a package name.

    * The payload is compliant with the NPM package version listing.

    * The `dist-tags` element will provide tags on certain versions, like the label of which version is the `latest`.

    * In calculating `latest` the highest stable semver version is used, not the most recently published version.

    * If an author has indicated that the package should no longer be used, the element `unlisted` will be populated for a
    version.

    '
- info:
    name: Download package version
    type: http
  http:
    method: GET
    url: https://packages.simplifier.net/:package-name/:package-version
    params:
    - name: package-name
      value: hl7.fhir.us.core
      type: path
      description: Name of the package
    - name: package-version
      value: 3.1.1
      type: path
      description: Version of the package
  docs: 'Download a specific package version.

    '
bundled: true