openapi: 3.0.3
info:
  title: LanguageTool HTTP Check Languages API
  description: LanguageTool checks texts for style and grammar issues. The HTTP API provides programmatic access to grammar checking, language detection, and personal dictionary management.
  version: '1.0'
  contact:
    name: LanguageTool
    url: https://languagetool.org/http-api/
  license:
    name: LGPL-2.1
    url: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
servers:
- url: https://api.languagetool.org/v2
  description: Public LanguageTool API
- url: https://api.languagetoolplus.com/v2
  description: LanguageTool Plus (Premium) API
tags:
- name: Languages
paths:
  /languages:
    get:
      summary: List supported languages
      description: Retrieves a list of all supported languages with codes and names.
      operationId: listLanguages
      responses:
        '200':
          description: List of supported languages.
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Language'
      tags:
      - Languages
components:
  schemas:
    Language:
      type: object
      properties:
        name:
          type: string
          example: English (US)
        code:
          type: string
          example: en
        longCode:
          type: string
          example: en-US