The endpoint of a project or resource can be used to either search for resources in Simplifier or to read, search, add and update resources in a FHIR client. System wide searches and history searches are also supported. To retrieve the endpoint of a project or resource in Simplifier click on API in the top right menu when visiting either the project or resource page. The below image shows the location.


Project FHIR API

The project FHIR API is available at both project and resource level. You will need the FHIR endpoint when you want to use a FHIR client to read or add and update resources to your Simplifier project. For example, the Firely Server - FHIR server supports the import of resources from Simplifier by supporting a (manual) import operation and specification of the project’s endpoint and authentication in the appsettings.

On the project page, you can retrieve the FHIR endpoint of your project.


On the resource page, you can retrieve the FHIR endpoint of your resource. You will need this endpoint to find your resource when using a FHIR client.


Project ZIP API

The project ZIP API is available at project level. You can use the ZIP endpoint for synchronization. With an HTTP tool you can use GET or PUT https://api.simplifier.net/<yourproject>/zip to retrieve or update your project in zipped form.


JWT authentication

The ZIP endpoint is available for Simplifier users based on JWT authentication.

First retrieve a JWT token from Simplifier. This works with a POST at https://api.simplifier.net/token with your account details in the message body in JSON format. Header should be Content-Type: application/json

POST https://api.simplifier.net/token

Content-Type: application/json

     "Email": "youremail@example.com",
     "Password": "your password"

Downloading or uploading your project works with a GET or a PUT at https://api.simplifier.net/<project>/zip with an authorization header that includes your retrieved token as shown below. The token is valid for 8 hours.

GET https://api.simplifier.net/<yourproject>/zip

Authorization: Bearer <access_token>

Simplifier FHIR API

Using the global Simplifier FHIR API, users can search for all resources in Simplifier. For example, the request GET https://stu3.simplifier.net/open/Patient can be used to retrieve all (STU3) Patient resources from Simplifier. The global Simplifier endpoint of your resource is available at the resource page beneath the API icon. All resources have a globally unique GUID.


Search Parameters

It is possible to use search parameters and search result parameter to filter the results from Simplifier. All parameters, with the exception of ‘description’, follow the STU3 FHIR specification. The following parameters are implemented:

Search paramters

Name Type Description Expression
url uri The uri that identifies the structure definition StructureDefinition.url
type token Type defined or constrained by this structure StructureDefinition.type
status token The current status of the structure definition StructureDefinition.status
publisher string Name of the publisher of the structure definition StructureDefinition.publisher
jurisdiction token Intended jurisdiction for the structure definition StructureDefinition.jurisdiction
kind token (primitive-type | complex-type | resource | logical)
Only accepted value is “logical”, the rest of the
values will return non-logical model resources.
(So this parameter will distinguish between
profiles and logical models)
description string Will look at the publication description used in
Simplifier (set either manually by user or generated
automatically using the FHIRpath metadata expressions
written in project settings), not the description
value inside the Confromance Resources.

Search result parameters

Name Description
_sort Only default “lastUpdated” is implemented.
_count Default value is “false”. The parameter _count is defined as a hint to Simplifier regarding how many resources should be returned in a single page.
_summary The _summary parameter requests the server to return a subset of the resource.


  • type
GET https://stu3.simplifier.net/<yourproject>/Patient
  • description
GET https://stu3.simplifier.net/<yourproject>/StructureDefinition?description:contains=<searchedterm>
  • _summary
GET https://stu3.simplifier.net/<yourproject>/StructureDefinition?_summary=true