openapi: 3.1.0
info:
  title: DeepL Translation Documents Languages API
  description: The DeepL API exposes machine translation, document translation, glossary management, write/improve, and usage endpoints. Both Pro and Free tiers are available, hosted on different base URLs.
  version: '2'
  contact:
    name: DeepL Developers
    url: https://developers.deepl.com/
servers:
- url: https://api.deepl.com/v2
  description: DeepL Pro
- url: https://api-free.deepl.com/v2
  description: DeepL Free
security:
- authKey: []
tags:
- name: Languages
paths:
  /languages:
    get:
      summary: List supported languages
      operationId: listLanguages
      tags:
      - Languages
      responses:
        '200':
          description: Supported source/target languages.
components:
  securitySchemes:
    authKey:
      type: apiKey
      in: header
      name: Authorization
      description: DeepL-Auth-Key <key>