openapi: 3.0.3
info:
  title: athenahealth FHIR Subscriptions API
  description: |
    The athenahealth Event Subscription Platform delivers near real-time
    healthcare-domain event notifications via FHIR Subscriptions (R5 Backport).
    Currently supports the rest-hook channel and id-only payload type.
  version: 1.0.0
servers:
- url: https://api.platform.athenahealth.com/fhir/r4
  description: Production
- url: https://api.preview.platform.athenahealth.com/fhir/r4
  description: Preview
security:
- oauth2: []
paths:
  /Subscription:
    get:
      summary: Search Subscriptions
      operationId: searchSubscriptions
      tags: [Subscription]
      responses:
        '200':
          description: Bundle of Subscription resources
    post:
      summary: Create Subscription
      operationId: createSubscription
      tags: [Subscription]
      requestBody:
        required: true
        content:
          application/fhir+json:
            schema:
              $ref: '#/components/schemas/Subscription'
      responses:
        '201':
          description: Subscription created
  /Subscription/{id}:
    get:
      summary: Read Subscription
      operationId: readSubscription
      tags: [Subscription]
      parameters:
      - name: id
        in: path
        required: true
        schema: {type: string}
      responses:
        '200':
          description: Subscription resource
    delete:
      summary: Delete Subscription
      operationId: deleteSubscription
      tags: [Subscription]
      parameters:
      - name: id
        in: path
        required: true
        schema: {type: string}
      responses:
        '204':
          description: Deleted
  /Subscription/{id}/$status:
    get:
      summary: Get Subscription Status
      operationId: getSubscriptionStatus
      tags: [Subscription]
      parameters:
      - name: id
        in: path
        required: true
        schema: {type: string}
      responses:
        '200':
          description: SubscriptionStatus
components:
  securitySchemes:
    oauth2:
      type: oauth2
      flows:
        clientCredentials:
          tokenUrl: https://api.platform.athenahealth.com/oauth2/v1/token
          scopes:
            system/Subscription.read: Read Subscriptions
            system/Subscription.write: Manage Subscriptions
  schemas:
    Subscription:
      type: object
      properties:
        resourceType: {type: string, enum: [Subscription]}
        status: {type: string, enum: [requested, active, error, off]}
        criteria: {type: string}
        channel:
          type: object
          properties:
            type: {type: string, enum: [rest-hook]}
            endpoint: {type: string, format: uri}
            payload: {type: string, enum: ['application/fhir+json']}
            header:
              type: array
              items: {type: string}