openapi: 3.1.0
info:
  title: Kanban Tool API v3 Attachments Subtasks API
  description: Minimal OpenAPI 3.1 description of the Kanban Tool REST API v3 covering users, boards, tasks, subtasks, comments, attachments, and time trackers.
  version: 3.0.0
servers:
- url: https://YOUR_DOMAIN.kanbantool.com/api/v3
  description: Kanban Tool account API base
tags:
- name: Subtasks
paths:
  /subtasks/{subtask_id}.json:
    parameters:
    - name: subtask_id
      in: path
      required: true
      schema:
        type: string
    patch:
      summary: Update subtask
      operationId: updateSubtask
      requestBody:
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: OK
      tags:
      - Subtasks
    delete:
      summary: Delete subtask
      operationId: deleteSubtask
      responses:
        '204':
          description: Deleted
      tags:
      - Subtasks
  /subtasks/reorder.json:
    put:
      summary: Reorder subtasks
      operationId: reorderSubtasks
      requestBody:
        content:
          application/json:
            schema:
              type: object
      responses:
        '200':
          description: OK
      tags:
      - Subtasks
x-generated-from: https://kanbantool.com/developer/api-v3
x-generated-by: claude-crawl-2026-05-08