openapi: 3.1.0
info:
  title: Trefle Distributions Subkingdoms API
  description: Trefle is an open, freely accessible botanical data source and REST API for plant information. The API provides access to data on kingdoms, subkingdoms, divisions, plant families, genus, plant species, and geographic distributions. Over 400,000 plant species are available. Authentication uses a personal access token passed as a query parameter or Authorization header.
  version: 1.0.0
  contact:
    name: Trefle Support
    url: https://trefle.io
  license:
    name: MIT
    url: https://github.com/treflehq/trefle-api/blob/master/LICENSE
servers:
- url: https://trefle.io/api/v1
  description: Trefle Production API
security:
- tokenAuth: []
tags:
- name: Subkingdoms
  description: Retrieve botanical subkingdom classification data.
paths:
  /subkingdoms:
    get:
      operationId: listSubkingdoms
      summary: List Subkingdoms
      description: Returns a list of botanical subkingdoms.
      tags:
      - Subkingdoms
      responses:
        '200':
          description: Subkingdoms returned
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      $ref: '#/components/schemas/TaxonomyEntry'
        '401':
          $ref: '#/components/responses/Unauthorized'
components:
  schemas:
    TaxonomyEntry:
      type: object
      properties:
        id:
          type: integer
        name:
          type: string
        slug:
          type: string
        links:
          type: object
  responses:
    Unauthorized:
      description: Authentication failed. Access token missing, invalid, or expired.
      content:
        application/json:
          schema:
            type: object
            properties:
              error:
                type: string
              message:
                type: string
  securitySchemes:
    tokenAuth:
      type: apiKey
      in: query
      name: token
      description: 'Trefle personal access token obtained by registering at trefle.io. Can be passed as a query parameter (?token=YOUR_TOKEN) or in the Authorization header (Authorization: Bearer YOUR_TOKEN).'