curl --request PATCH \
  --url https://api.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'cal-api-version: <cal-api-version>' \
  --data '
{
  "host": {
    "mode": "custom",
    "template": "Meeting with {ATTENDEE}"
  },
  "guest": {
    "mode": "inherit"
  }
}
'

import requests

url = "https://api.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites"

payload = {
    "host": {
        "mode": "custom",
        "template": "Meeting with {ATTENDEE}"
    },
    "guest": { "mode": "inherit" }
}
headers = {
    "cal-api-version": "<cal-api-version>",
    "Authorization": "<authorization>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'PATCH',
  headers: {
    'cal-api-version': '<cal-api-version>',
    Authorization: '<authorization>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    host: {mode: 'custom', template: 'Meeting with {ATTENDEE}'},
    guest: {mode: 'inherit'}
  })
};

fetch('https://api.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites', 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.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "PATCH",
  CURLOPT_POSTFIELDS => json_encode([
    'host' => [
        'mode' => 'custom',
        'template' => 'Meeting with {ATTENDEE}'
    ],
    'guest' => [
        'mode' => 'inherit'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <authorization>",
    "Content-Type: application/json",
    "cal-api-version: <cal-api-version>"
  ],
]);

$response = curl_exec($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.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites"

	payload := strings.NewReader("{\n  \"host\": {\n    \"mode\": \"custom\",\n    \"template\": \"Meeting with {ATTENDEE}\"\n  },\n  \"guest\": {\n    \"mode\": \"inherit\"\n  }\n}")

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

	req.Header.Add("cal-api-version", "<cal-api-version>")
	req.Header.Add("Authorization", "<authorization>")
	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.patch("https://api.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites")
  .header("cal-api-version", "<cal-api-version>")
  .header("Authorization", "<authorization>")
  .header("Content-Type", "application/json")
  .body("{\n  \"host\": {\n    \"mode\": \"custom\",\n    \"template\": \"Meeting with {ATTENDEE}\"\n  },\n  \"guest\": {\n    \"mode\": \"inherit\"\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cal.com/v2/organizations/{orgId}/teams/{teamId}/event-types/{eventTypeId}/calendar-invites")

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

request = Net::HTTP::Patch.new(url)
request["cal-api-version"] = '<cal-api-version>'
request["Authorization"] = '<authorization>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"host\": {\n    \"mode\": \"custom\",\n    \"template\": \"Meeting with {ATTENDEE}\"\n  },\n  \"guest\": {\n    \"mode\": \"inherit\"\n  }\n}"

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

{
  "status": "success",
  "data": {
    "host": {
      "mode": "custom",
      "template": "Meeting with {ATTENDEE}",
      "organizationTemplate": "Organization default: {LINK_TITLE}"
    },
    "guest": {
      "mode": "custom",
      "template": "Meeting with {ATTENDEE}",
      "organizationTemplate": "Organization default: {LINK_TITLE}"
    },
    "readOnly": false,
    "hasOrganization": true
  }
}