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

27.9/100 thin ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessSelf serve

1 APIs

Healthcare Canada EHR EMR Primary Care Open-Source FHIR HL7 Interoperability SMART on FHIR Authentication

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 27.9/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 9.3 / 17

Access Clarity 4.0 / 17

Operational Transparency 0.3 / 11

Contract Governance 1.9 / 10

Discoverability 5.7 / 9

Regulatory Posture 5.8 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

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

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Health regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/oscar-emr: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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)

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.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: low
  source:
  - authentication
  - security
  - url: https://oscar-emr.com/
    status: 301
    note: declared website redirects to https://fammed.mcmaster.ca/oscar-emr/ — a different registrable domain (oscar-emr.com
      -> mcmaster.ca), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-02'
  method: derived
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
- Authentication
tags_raw:
- Healthcare
- Canada
- EHR
- EMR
- Primary Care
- Open Source
- FHIR
- HL7
- Interoperability
- SMART on FHIR
- OAuth
created: '2026-07-24'
modified: '2026-07-24'
specificationVersion: '0.23'
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

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