curl --request POST \
  --url https://api.teamfollowup.ai/api/native-calendar/calendars/preview \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
  "calendarId": "cal_6b1f2a7c90",
  "calendar": {
    "timezone": "America/Chicago",
    "weeklyHours": {
      "mon": [
        {
          "start": "08:00",
          "end": "18:00"
        }
      ]
    },
    "slotDurationMinutes": 45,
    "minNoticeMinutes": 60
  }
}'

import requests

url = "https://api.teamfollowup.ai/api/native-calendar/calendars/preview"

payload = { "calendar": {
        "timezone": "America/Chicago",
        "weeklyHours": { "mon": [
                {
                    "start": "08:00",
                    "end": "18:00"
                }
            ] },
        "slotDurationMinutes": 45,
        "minNoticeMinutes": 60
    } }
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({
    calendar: {
      timezone: 'America/Chicago',
      weeklyHours: {mon: [{start: '08:00', end: '18:00'}]},
      slotDurationMinutes: 45,
      minNoticeMinutes: 60
    }
  })
};

fetch('https://api.teamfollowup.ai/api/native-calendar/calendars/preview', 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.teamfollowup.ai/api/native-calendar/calendars/preview",
  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([
    'calendar' => [
        'timezone' => 'America/Chicago',
        'weeklyHours' => [
                'mon' => [
                                [
                                                                'start' => '08:00',
                                                                'end' => '18:00'
                                ]
                ]
        ],
        'slotDurationMinutes' => 45,
        'minNoticeMinutes' => 60
    ]
  ]),
  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.teamfollowup.ai/api/native-calendar/calendars/preview"

	payload := strings.NewReader("{\n  \"calendar\": {\n    \"timezone\": \"America/Chicago\",\n    \"weeklyHours\": {\n      \"mon\": [\n        {\n          \"start\": \"08:00\",\n          \"end\": \"18:00\"\n        }\n      ]\n    },\n    \"slotDurationMinutes\": 45,\n    \"minNoticeMinutes\": 60\n  }\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.teamfollowup.ai/api/native-calendar/calendars/preview")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"calendar\": {\n    \"timezone\": \"America/Chicago\",\n    \"weeklyHours\": {\n      \"mon\": [\n        {\n          \"start\": \"08:00\",\n          \"end\": \"18:00\"\n        }\n      ]\n    },\n    \"slotDurationMinutes\": 45,\n    \"minNoticeMinutes\": 60\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.teamfollowup.ai/api/native-calendar/calendars/preview")

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  \"calendar\": {\n    \"timezone\": \"America/Chicago\",\n    \"weeklyHours\": {\n      \"mon\": [\n        {\n          \"start\": \"08:00\",\n          \"end\": \"18:00\"\n        }\n      ]\n    },\n    \"slotDurationMinutes\": 45,\n    \"minNoticeMinutes\": 60\n  }\n}"

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

{
  "success": true,
  "data": {
    "timezone": "America/Chicago",
    "slots": {
      "2026-09-24": {
        "slots": [
          "2026-09-24T14:00:00.000Z",
          "2026-09-24T14:30:00.000Z",
          "2026-09-24T15:00:00.000Z"
        ]
      },
      "2026-09-25": {
        "slots": [
          "2026-09-25T14:00:00.000Z"
        ]
      }
    }
  }
}

{
  "success": false,
  "error": "timezone is required"
}

{
  "success": false,
  "error": "Unauthorized"
}

{
  "success": false,
  "error": "calendar does not belong to this project"
}

{
  "success": false,
  "error": "calendar not found"
}

{
  "success": false,
  "error": "TooManyRequests"
}

{
  "success": false,
  "error": "Calendar request failed."
}

{
  "success": false,
  "error": "Calendar service is unreachable."
}