OSCAR EMR

OSCAR EMR is an open-source electronic medical record (EMR) system created by Dr. David Chan and McMaster University's Department of Family Medicine, and one of Canada's most widely deployed primary-care EMRs. The core software is distributed under the GPL v2+ license (mirrored on GitHub as scoophealth/oscar and on Bitbucket), while the commercially supported OSCAR Pro distribution is delivered by the WELL EMR Group (a WELL Health company) to more than 2,000 clinics and 10,000 providers across Canada. OSCAR exposes a documented REST web-services API under the /ws/services path (scheduling, demographics, billing, prescriptions, documents, labs, ticklers, eForms and providers), secured with 3-legged OAuth 1.0a via /ws/oauth. Clinical data flows historically use HL7 v2 messaging, and OSCAR ships an internal HL7 FHIR integration used for Ontario public-health and immunization reporting (BORN, DHIR). Third-party integrations for OSCAR Pro are partner-gated through the apps.health marketplace. As self-hosted software there is no single public API host or hosted FHIR CapabilityStatement; the API surface is documented on the OSCAR EMR developer wiki and realized per clinic deployment.

OSCAR EMR publishes 1 API on the APIs.io network. Tagged areas include Healthcare, Canada, EHR, EMR, and Primary Care.

OSCAR EMR’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, pricing, authentication, and 11 more developer resources.

🌐 Visit website 📡 Source on GitHub
25.5/100 emerging ▬ flat Agent 10/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
1 APIs
HealthcareCanadaEHREMRPrimary CareOpen SourceFHIRHL7InteroperabilitySMART on FHIROAuth

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 25.5/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 10.0 / 20
Commercial Clarity 4.7 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 8.0 / 10
Agent readiness — 10/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
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APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

OSCAR REST Web Services API

OSCAR's REST web-services layer, served under the /ws/services base path of a deployed OSCAR instance, covering most of the clinical record - scheduling/appointments, demographi...

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Oscar Emr Authentication

oauth1a/oauth2 · 2 schemes

SECURITY

Oscar Emr Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp

Documentation 2

Reference material describing how the API behaves

Documentation
Documentation
 APIReference
APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 Conventions
Conventions
 Lifecycle
Lifecycle

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization
 SourceCode
SourceCode

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication
 DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support
Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing
Pricing

Company 1

The organization behind the API

Website
Website

Other 1

Properties that don't map to a standard resource type

Marketplace
Marketplace

Source (apis.yml)

apis.yml Raw ↑ 
aid: oscar-emr
url: https://raw.githubusercontent.com/api-evangelist/oscar-emr/refs/heads/main/apis.yml
name: OSCAR EMR
kind: company
description: OSCAR EMR is an open-source electronic medical record (EMR) system created by Dr. David Chan and McMaster University's
  Department of Family Medicine, and one of Canada's most widely deployed primary-care EMRs. The core software is distributed
  under the GPL v2+ license (mirrored on GitHub as scoophealth/oscar and on Bitbucket), while the commercially supported OSCAR
  Pro distribution is delivered by the WELL EMR Group (a WELL Health company) to more than 2,000 clinics and 10,000 providers
  across Canada. OSCAR exposes a documented REST web-services API under the /ws/services path (scheduling, demographics, billing,
  prescriptions, documents, labs, ticklers, eForms and providers), secured with 3-legged OAuth 1.0a via /ws/oauth. Clinical
  data flows historically use HL7 v2 messaging, and OSCAR ships an internal HL7 FHIR integration used for Ontario public-health
  and immunization reporting (BORN, DHIR). Third-party integrations for OSCAR Pro are partner-gated through the apps.health
  marketplace. As self-hosted software there is no single public API host or hosted FHIR CapabilityStatement; the API surface
  is documented on the OSCAR EMR developer wiki and realized per clinic deployment.
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Healthcare
- Canada
- EHR
- EMR
- Primary Care
- Open Source
- FHIR
- HL7
- Interoperability
- SMART on FHIR
- OAuth
created: '2026-07-24'
modified: '2026-07-24'
specificationVersion: '0.19'
apis:
- aid: oscar-emr:oscar-rest-web-services-api
  name: OSCAR REST Web Services API
  description: 'OSCAR''s REST web-services layer, served under the /ws/services base path of a deployed OSCAR instance, covering
    most of the clinical record - scheduling/appointments, demographics, billing, prescriptions, documents, labs, ticklers,
    eForms and providers. Applications register as REST clients through the OSCAR Administration interface and authenticate
    provider users with 3-legged OAuth 1.0a (/ws/oauth/initiate, /ws/oauth/authorize, /ws/oauth/token). As self-hosted software
    the host and web context are deployment-specific (documented example: http://localhost:8080/oscar_15/ws/services), so
    no single public base URL exists. The API is documented on the OSCAR EMR developer wiki; runtime documentation is generated
    with RAML (RAML for JAX-RS) rather than OpenAPI/Swagger, and there is no downloadable static spec published.'
  humanURL: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/79855638/Connecting+to+OSCAR's+REST+API
  tags:
  - EHR
  - EMR
  - REST
  - Primary Care
  - Canada
  properties:
  - type: Documentation
    url: https://oscaremr.atlassian.net/wiki/spaces/OS/overview
  - type: APIReference
    url: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/85396074/Documenting+the+REST+API
  - type: GettingStarted
    url: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/79855638/Connecting+to+OSCAR's+REST+API
  - type: Authentication
    url: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/79855638/Connecting+to+OSCAR's+REST+API
common:
- type: DomainSecurity
  url: security/oscar-emr-domain-security.yml
- type: Website
  url: https://oscar-emr.com/
- type: DeveloperPortal
  url: https://oscaremr.atlassian.net/wiki/spaces/OS/overview
- type: Documentation
  url: https://oscaremr.atlassian.net/wiki/spaces/OS/overview
- type: APIReference
  url: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/85396074/Documenting+the+REST+API
- type: GettingStarted
  url: https://oscaremr.atlassian.net/wiki/spaces/OS/pages/79855638/Connecting+to+OSCAR's+REST+API
- type: GitHubOrganization
  url: https://github.com/scoophealth
- type: SourceCode
  url: https://bitbucket.org/oscaremr/oscar/src/stable/
- type: Marketplace
  url: https://apps.health/
- type: SignUp
  url: https://share.hsforms.com/1p6l4kFOyRh6_7RfxVHpYTQcgcz4
- type: Support
  url: mailto:help@oscarprodesk.ca
- type: Pricing
  url: https://get.oscarpro.ca/
- type: Authentication
  url: authentication/oscar-emr-authentication.yml
- type: Conformance
  url: conformance/oscar-emr-conformance.yml
- type: Conventions
  url: conventions/oscar-emr-conventions.yml
- type: Lifecycle
  url: lifecycle/oscar-emr-lifecycle.yml
- type: DomainSecurity
  url: security/oscar-emr-domain-security.yml
- type: LLMsTxt
  url: llms/oscar-emr-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com