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.
Firely publishes 2 APIs on the APIs.io network: Catalog API and Simplifier.net FHIR Package API API. Tagged areas include FHIR, HL7, Healthcare, Health IT, and Interoperability.
Firely’s developer surface includes developer portal, documentation, tooling, code examples, pricing, signup flow, training material, and 48 more developer resources.
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...
aid: firely-server
name: Firely
description: 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.
tags:
- FHIR
- HL7
- Healthcare
- Health IT
- Interoperability
- Clinical Data
- FHIR Server
- Vonk
- Simplifier
- Forge
- Terminology
- SMART on FHIR
- Bulk Data
- CDS Hooks
- Implementation Guides
- .NET SDK
- CQL
- Profile Registry
kind: contract
accessModel:
pricing: unknown
onboarding: unknown
trial: false
try_now: false
public: false
label: Unknown
confidence: low
source: []
generated: '2026-07-22'
method: derived
position: Provider
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/firely-server.png
url: https://raw.githubusercontent.com/api-evangelist/firely-server/refs/heads/main/apis.yml
created: '2026-05-25'
modified: '2026-05-25'
specificationVersion: '0.20'
apis:
- aid: firely-server:firely-server-fhir-rest-api
name: Firely Server FHIR REST API
description: 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 statement (/metadata), conditional operations, and
conformance-driven validation — plus pluggable modules for Terminology Services, Bulk Data Access ($export), SMART on
FHIR, CDS Hooks, Subscriptions/PubSub, FHIR Mapping Language, and custom search parameters. Firely Server supports FHIR
R4, R4B, R5, and STU3 across MongoDB and SQL Server backends and is G10, ONC, and ISiK certified. The API contract is
the HL7 FHIR specification itself; there is no public hosted multi-tenant base URL — customers self-host Firely Server
on Windows, Linux, macOS, Docker, or Kubernetes.
humanURL: https://docs.fire.ly/projects/Firely-Server/
tags:
- FHIR
- REST
- Healthcare
- CRUD
- Search
- Terminology
- Bulk Data
- SMART on FHIR
- CDS Hooks
- Subscriptions
properties:
- type: Documentation
url: https://docs.fire.ly/projects/Firely-Server/
name: Firely Server Documentation
- type: Standards
url: https://hl7.org/fhir/http.html
name: HL7 FHIR RESTful API specification
- type: Standards
url: https://hl7.org/fhir/
name: HL7 FHIR Specification
- type: Documentation
url: https://hl7.org/fhir/uv/bulkdata/
name: FHIR Bulk Data Access IG
- type: Documentation
url: https://hl7.org/fhir/smart-app-launch/
name: SMART App Launch
- type: Sample
url: https://github.com/FirelyTeam/firely-pubsub-sample
name: Firely Server PubSub sample
- type: Sample
url: https://github.com/FirelyTeam/Vonk.Facade.Starter
name: Vonk Facade starter project
- type: Plugin
url: https://github.com/FirelyTeam/Vonk.Plugin.DocumentOperation
name: Vonk $document operation plugin
- type: Plugin
url: https://github.com/FirelyTeam/Vonk.Plugin.ExampleOperation
name: Vonk plugin template
- aid: firely-server:firely-server-catalog-api
name: Firely Catalog API
description: The Catalog API from Firely — 1 operation(s) for catalog.
humanURL: https://docs.fire.ly/projects/Simplifier/features/api.html
baseURL: https://packages.simplifier.net/
tags:
- Catalog
properties:
- type: OpenAPI
url: openapi/firely-server-catalog-api-openapi.yml
- type: Documentation
url: https://docs.fire.ly/projects/Simplifier/features/api.html
- type: Documentation
url: https://app.swaggerhub.com/apis/firely/Simplifier.net_FHIR_Package_API/1.0.1
- type: Registry
url: https://registry.fhir.org/
- aid: firely-server:firely-server-simplifier-net-fhir-package-api-api
name: Firely Simplifier.net FHIR Package API API
description: The Simplifier.net FHIR Package API API from Firely — 2 operation(s) for simplifier.net fhir package api.
humanURL: https://docs.fire.ly/projects/Simplifier/features/api.html
baseURL: https://packages.simplifier.net/
tags:
- Simplifier.net FHIR Package API
properties:
- type: OpenAPI
url: openapi/firely-server-simplifier-net-fhir-package-api-api-openapi.yml
- type: Documentation
url: https://docs.fire.ly/projects/Simplifier/features/api.html
- type: Documentation
url: https://app.swaggerhub.com/apis/firely/Simplifier.net_FHIR_Package_API/1.0.1
- type: Registry
url: https://registry.fhir.org/
common:
- type: AgenticAccess
url: agentic-access/firely-server-agentic-access.yml
- type: DomainSecurity
url: security/firely-server-domain-security.yml
- type: Website
url: https://fire.ly
- type: Portal
url: https://docs.fire.ly
- type: Documentation
url: https://docs.fire.ly/projects/Firely-Server/
name: Firely Server Documentation
- type: Documentation
url: https://docs.fire.ly/projects/Firely-NET-SDK/
name: Firely .NET SDK Documentation
- type: Documentation
url: https://docs.fire.ly/projects/Simplifier/
name: Simplifier Documentation
- type: Documentation
url: https://docs.fire.ly/projects/Forge/
name: Forge Documentation
- type: Documentation
url: https://docs.fire.ly/projects/Firely-Terminal/
name: Firely Terminal Documentation
- type: Product
url: https://fire.ly/firely-server/
name: Firely Server (Vonk)
- type: Product
url: https://fire.ly/products/firely-net-sdk/
name: Firely .NET SDK
- type: Product
url: https://fire.ly/products/simplifier-net/
name: Simplifier.net
- type: Product
url: https://fire.ly/forge/
name: Forge
- type: Product
url: https://fire.ly/products/firely-terminal/
name: Firely Terminal
- type: Product
url: https://fire.ly/products/firely-auth/
name: Firely Auth
- type: Product
url: https://fire.ly/products/fhir-facade/
name: FHIR Facade
- type: Product
url: https://fire.ly/products/firely-server-ingest/
name: Firely Server Ingest
- type: GitHubOrganization
url: https://github.com/FirelyTeam
- type: SDKs
url: https://github.com/FirelyTeam/firely-net-sdk
name: Firely .NET SDK (C#)
- type: SDKs
url: https://github.com/FirelyTeam/firely-cql-sdk
name: Firely CQL SDK
- type: Tools
url: https://github.com/FirelyTeam/spark
name: Spark FHIR Server (open source)
- type: Tools
url: https://github.com/FirelyTeam/firely-validator-api
name: Firely Validator API
- type: Tools
url: https://github.com/FirelyTeam/Firely.Fhir.Packages
name: Firely FHIR Packages library
- type: Tools
url: https://github.com/FirelyTeam/Fhir.Metrics
name: Fhir.Metrics (UCUM)
- type: Tools
url: https://github.com/FirelyTeam/firely-terminal-pipeline
name: Firely Terminal GitHub Action
- type: HelmChart
url: https://github.com/FirelyTeam/Helm.Charts
name: Firely Helm Charts
- type: HelmChart
url: https://github.com/FirelyTeam/Vonk.Helm.Charts
name: Vonk Helm Charts
- type: CodeExamples
url: https://github.com/FirelyTeam/firely-pubsub-sample
name: Firely Server PubSub sample
- type: CodeExamples
url: https://github.com/FirelyTeam/fhirstarters
name: FHIR Starters example projects
- type: CodeExamples
url: https://github.com/FirelyTeam/Vonk.Facade.Starter
name: Vonk Facade Starter
- type: CodeExamples
url: https://github.com/FirelyTeam/Vonk.Facade.Relational
name: Vonk Facade Relational base
- type: CodeExamples
url: https://github.com/FirelyTeam/Firely.Fhir.ValidationDemo
name: Firely FHIR Validation Demo
- type: CodeExamples
url: https://github.com/FirelyTeam/ACME-FSH-IG-Example
name: ACME FSH IG Example
- type: CodeExamples
url: https://github.com/FirelyTeam/ACME-FSH-Example
name: ACME FSH Example
- type: Plugin
url: https://github.com/FirelyTeam/Vonk.Plugin.DocumentOperation
name: Vonk $document operation plugin
- type: Plugin
url: https://github.com/FirelyTeam/Vonk.Plugin.ExampleOperation
name: Vonk plugin template
- type: SDKs
url: https://github.com/FirelyTeam/RonFHIR
name: R on FHIR
- type: Tools
url: https://github.com/FirelyTeam/Wind.Tunnel
name: Wind.Tunnel FHIR server performance testing
- type: Tools
url: https://github.com/FirelyTeam/firely-browser-extension
name: Firely Browser Extension
- type: Tools
url: https://github.com/FirelyTeam/fhir-codegen
name: FHIR code generation tools
- type: Tools
url: https://github.com/FirelyTeam/Hl7.Fhir.Validation.Legacy
name: HL7 FHIR Validation (Legacy)
- type: Template
url: https://github.com/FirelyTeam/fhir-specification-template-repository
name: FHIR Specification Template Repository
- type: Documentation
url: https://github.com/FirelyTeam/firely-docs
name: Firely Documentation Source
- type: Skills
url: https://github.com/FirelyTeam/skills
name: Firely Agent Skills
- type: Registry
url: https://simplifier.net
name: Simplifier.net FHIR Registry
- type: Standards
url: https://hl7.org/fhir/
name: HL7 FHIR Specification (co-developed)
- type: Pricing
url: https://fire.ly/firely-server/
name: Firely Server pricing (contact sales)
- type: Signup
url: https://simplifier.net/login
name: Simplifier.net Sign Up
- type: Training
url: https://fire.ly/training/
- type: Consulting
url: https://fire.ly/services/
- type: Blog
url: https://fire.ly/blog/
- type: LinkedIn
url: https://www.linkedin.com/company/firely/
- type: Twitter
url: https://twitter.com/FirelyTeam
- type: YouTube
url: https://www.youtube.com/c/Firely
- type: Contact
url: https://fire.ly/contact/
- type: Customers
url: https://fire.ly/customers/
- type: Features
data:
- 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
sources:
- https://fire.ly
- https://fire.ly/firely-server/
- https://docs.fire.ly
- https://github.com/FirelyTeam
- https://simplifier.net
updated: '2026-05-25'
maintainers:
- FN: Kin Lane
email: info@apievangelist.com
X: apievangelist
url: https://apievangelist.com
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