Google Calendar freeBusy API

openapi: 3.1.0
info:
  title: Google Calendar Calendars freeBusy API
  description: The Google Calendar API provides RESTful access to Google Calendar data. It enables managing calendars, events, access control lists, settings, and free/busy information.
  version: v3
  contact:
    name: Google
    url: https://developers.google.com/workspace/calendar/api/guides/overview
servers:
- url: https://www.googleapis.com/calendar/v3
tags:
- name: freeBusy
paths:
  /freeBusy:
    post:
      operationId: queryFreeBusy
      summary: Google Calendar Query free/busy
      description: Returns free/busy information for a set of calendars.
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/FreeBusyRequest'
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FreeBusyResponse'
      tags:
      - freeBusy
components:
  schemas:
    FreeBusyResponse:
      type: object
      properties:
        kind:
          type: string
        timeMin:
          type: string
          format: date-time
        timeMax:
          type: string
          format: date-time
        calendars:
          type: object
    FreeBusyRequest:
      type: object
      properties:
        timeMin:
          type: string
          format: date-time
        timeMax:
          type: string
          format: date-time
        timeZone:
          type: string
        items:
          type: array
          items:
            type: object
            properties:
              id:
                type: string