curl --request POST \
  --url https://api.hubapi.com/scheduler/v3/meetings/calendar \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "associations": [
    {
      "to": {
        "id": "<string>"
      },
      "types": [
        {
          "associationTypeId": 123
        }
      ]
    }
  ],
  "emailReminderSchedule": {
    "reminders": [
      {
        "numberOfTimeUnits": 123
      }
    ],
    "shouldIncludeInviteDescription": true
  },
  "properties": {
    "hs_meeting_end_time": "2023-11-07T05:31:56Z",
    "hs_meeting_outcome": "<string>",
    "hs_meeting_start_time": "2023-11-07T05:31:56Z",
    "hs_meeting_title": "<string>",
    "hs_timestamp": "2023-11-07T05:31:56Z",
    "hubspot_owner_id": "<string>",
    "hs_activity_type": "<string>",
    "hs_attachment_ids": [
      "<string>"
    ],
    "hs_attendee_owner_ids": [
      "<string>"
    ],
    "hs_internal_meeting_notes": "<string>",
    "hs_meeting_body": "<string>",
    "hs_meeting_location": "<string>"
  },
  "timezone": "<string>"
}
'

import requests

url = "https://api.hubapi.com/scheduler/v3/meetings/calendar"

payload = {
    "associations": [
        {
            "to": { "id": "<string>" },
            "types": [{ "associationTypeId": 123 }]
        }
    ],
    "emailReminderSchedule": {
        "reminders": [{ "numberOfTimeUnits": 123 }],
        "shouldIncludeInviteDescription": True
    },
    "properties": {
        "hs_meeting_end_time": "2023-11-07T05:31:56Z",
        "hs_meeting_outcome": "<string>",
        "hs_meeting_start_time": "2023-11-07T05:31:56Z",
        "hs_meeting_title": "<string>",
        "hs_timestamp": "2023-11-07T05:31:56Z",
        "hubspot_owner_id": "<string>",
        "hs_activity_type": "<string>",
        "hs_attachment_ids": ["<string>"],
        "hs_attendee_owner_ids": ["<string>"],
        "hs_internal_meeting_notes": "<string>",
        "hs_meeting_body": "<string>",
        "hs_meeting_location": "<string>"
    },
    "timezone": "<string>"
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    associations: [{to: {id: '<string>'}, types: [{associationTypeId: 123}]}],
    emailReminderSchedule: {reminders: [{numberOfTimeUnits: 123}], shouldIncludeInviteDescription: true},
    properties: {
      hs_meeting_end_time: '2023-11-07T05:31:56Z',
      hs_meeting_outcome: '<string>',
      hs_meeting_start_time: '2023-11-07T05:31:56Z',
      hs_meeting_title: '<string>',
      hs_timestamp: '2023-11-07T05:31:56Z',
      hubspot_owner_id: '<string>',
      hs_activity_type: '<string>',
      hs_attachment_ids: ['<string>'],
      hs_attendee_owner_ids: ['<string>'],
      hs_internal_meeting_notes: '<string>',
      hs_meeting_body: '<string>',
      hs_meeting_location: '<string>'
    },
    timezone: '<string>'
  })
};

fetch('https://api.hubapi.com/scheduler/v3/meetings/calendar', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.hubapi.com/scheduler/v3/meetings/calendar",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'associations' => [
        [
                'to' => [
                                'id' => '<string>'
                ],
                'types' => [
                                [
                                                                'associationTypeId' => 123
                                ]
                ]
        ]
    ],
    'emailReminderSchedule' => [
        'reminders' => [
                [
                                'numberOfTimeUnits' => 123
                ]
        ],
        'shouldIncludeInviteDescription' => true
    ],
    'properties' => [
        'hs_meeting_end_time' => '2023-11-07T05:31:56Z',
        'hs_meeting_outcome' => '<string>',
        'hs_meeting_start_time' => '2023-11-07T05:31:56Z',
        'hs_meeting_title' => '<string>',
        'hs_timestamp' => '2023-11-07T05:31:56Z',
        'hubspot_owner_id' => '<string>',
        'hs_activity_type' => '<string>',
        'hs_attachment_ids' => [
                '<string>'
        ],
        'hs_attendee_owner_ids' => [
                '<string>'
        ],
        'hs_internal_meeting_notes' => '<string>',
        'hs_meeting_body' => '<string>',
        'hs_meeting_location' => '<string>'
    ],
    'timezone' => '<string>'
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.hubapi.com/scheduler/v3/meetings/calendar"

	payload := strings.NewReader("{\n  \"associations\": [\n    {\n      \"to\": {\n        \"id\": \"<string>\"\n      },\n      \"types\": [\n        {\n          \"associationTypeId\": 123\n        }\n      ]\n    }\n  ],\n  \"emailReminderSchedule\": {\n    \"reminders\": [\n      {\n        \"numberOfTimeUnits\": 123\n      }\n    ],\n    \"shouldIncludeInviteDescription\": true\n  },\n  \"properties\": {\n    \"hs_meeting_end_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_outcome\": \"<string>\",\n    \"hs_meeting_start_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_title\": \"<string>\",\n    \"hs_timestamp\": \"2023-11-07T05:31:56Z\",\n    \"hubspot_owner_id\": \"<string>\",\n    \"hs_activity_type\": \"<string>\",\n    \"hs_attachment_ids\": [\n      \"<string>\"\n    ],\n    \"hs_attendee_owner_ids\": [\n      \"<string>\"\n    ],\n    \"hs_internal_meeting_notes\": \"<string>\",\n    \"hs_meeting_body\": \"<string>\",\n    \"hs_meeting_location\": \"<string>\"\n  },\n  \"timezone\": \"<string>\"\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.hubapi.com/scheduler/v3/meetings/calendar")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"associations\": [\n    {\n      \"to\": {\n        \"id\": \"<string>\"\n      },\n      \"types\": [\n        {\n          \"associationTypeId\": 123\n        }\n      ]\n    }\n  ],\n  \"emailReminderSchedule\": {\n    \"reminders\": [\n      {\n        \"numberOfTimeUnits\": 123\n      }\n    ],\n    \"shouldIncludeInviteDescription\": true\n  },\n  \"properties\": {\n    \"hs_meeting_end_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_outcome\": \"<string>\",\n    \"hs_meeting_start_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_title\": \"<string>\",\n    \"hs_timestamp\": \"2023-11-07T05:31:56Z\",\n    \"hubspot_owner_id\": \"<string>\",\n    \"hs_activity_type\": \"<string>\",\n    \"hs_attachment_ids\": [\n      \"<string>\"\n    ],\n    \"hs_attendee_owner_ids\": [\n      \"<string>\"\n    ],\n    \"hs_internal_meeting_notes\": \"<string>\",\n    \"hs_meeting_body\": \"<string>\",\n    \"hs_meeting_location\": \"<string>\"\n  },\n  \"timezone\": \"<string>\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.hubapi.com/scheduler/v3/meetings/calendar")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"associations\": [\n    {\n      \"to\": {\n        \"id\": \"<string>\"\n      },\n      \"types\": [\n        {\n          \"associationTypeId\": 123\n        }\n      ]\n    }\n  ],\n  \"emailReminderSchedule\": {\n    \"reminders\": [\n      {\n        \"numberOfTimeUnits\": 123\n      }\n    ],\n    \"shouldIncludeInviteDescription\": true\n  },\n  \"properties\": {\n    \"hs_meeting_end_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_outcome\": \"<string>\",\n    \"hs_meeting_start_time\": \"2023-11-07T05:31:56Z\",\n    \"hs_meeting_title\": \"<string>\",\n    \"hs_timestamp\": \"2023-11-07T05:31:56Z\",\n    \"hubspot_owner_id\": \"<string>\",\n    \"hs_activity_type\": \"<string>\",\n    \"hs_attachment_ids\": [\n      \"<string>\"\n    ],\n    \"hs_attendee_owner_ids\": [\n      \"<string>\"\n    ],\n    \"hs_internal_meeting_notes\": \"<string>\",\n    \"hs_meeting_body\": \"<string>\",\n    \"hs_meeting_location\": \"<string>\"\n  },\n  \"timezone\": \"<string>\"\n}"

response = http.request(request)
puts response.read_body

{
  "createdAt": "2023-11-07T05:31:56Z",
  "id": "<string>",
  "lastUpdatedAt": "2023-11-07T05:31:56Z",
  "properties": {
    "hs_engagement_source_id": "<string>",
    "hs_meeting_end_time": "2023-11-07T05:31:56Z",
    "hs_meeting_outcome": "<string>",
    "hs_meeting_start_time": "2023-11-07T05:31:56Z",
    "hs_meeting_title": "<string>",
    "hs_timestamp": "2023-11-07T05:31:56Z",
    "hs_activity_type": "<string>",
    "hs_attachment_ids": [
      "<string>"
    ],
    "hs_attendee_owner_ids": [
      "<string>"
    ],
    "hs_include_description_in_reminder": "<string>",
    "hs_internal_meeting_notes": "<string>",
    "hs_meeting_body": "<string>",
    "hs_meeting_external_url": "<string>",
    "hs_meeting_location": "<string>",
    "hs_unique_id": "<string>",
    "hubspot_owner_id": "<string>"
  }
}

{
  "message": "Invalid input (details will vary based on the error)",
  "correlationId": "aeb5f871-7f07-4993-9211-075dc63e7cbf",
  "category": "VALIDATION_ERROR",
  "links": {
    "knowledge-base": "https://www.hubspot.com/products/service/knowledge-base"
  }
}