openapi: 3.1.0
info:
  title: MedDRA Medical Dictionary for Regulatory Activities Hierarchy Versions API
  description: MedDRA (Medical Dictionary for Regulatory Activities) and the WHO Drug Dictionary provide standardized medical terminology APIs for adverse event coding, drug safety reporting, and pharmacovigilance. APIs enable term lookup, hierarchy navigation, and coding validation for regulatory submissions to ICH, FDA, EMA, and other health authorities.
  version: 27.0.0
  contact:
    name: MedDRA MSSO Support
    url: https://www.meddra.org/contact-msso
  license:
    name: MedDRA License Agreement
    url: https://www.meddra.org/license-subscription
servers:
- url: https://api.meddra.example.com/v1
  description: MedDRA API server (requires subscription)
security:
- APIKey: []
- BearerAuth: []
tags:
- name: Versions
  description: Dictionary version management
paths:
  /versions:
    get:
      operationId: listVersions
      summary: List available MedDRA versions
      description: Returns all MedDRA dictionary versions available through the API.
      tags:
      - Versions
      responses:
        '200':
          description: Available versions
          content:
            application/json:
              schema:
                type: object
                properties:
                  versions:
                    type: array
                    items:
                      type: object
                      properties:
                        version:
                          type: string
                        releaseDate:
                          type: string
                          format: date
                        current:
                          type: boolean
components:
  securitySchemes:
    APIKey:
      type: apiKey
      in: header
      name: X-API-Key
    BearerAuth:
      type: http
      scheme: bearer
externalDocs:
  description: MedDRA Documentation
  url: https://www.meddra.org/