curl --request POST \
  --url https://api.cal.com/v2/event-types/{eventTypeId}/booking-fields \
  --header 'Authorization: <authorization>' \
  --header 'Content-Type: application/json' \
  --header 'cal-api-version: <cal-api-version>' \
  --data '
{
  "bookingFields": [
    {
      "field": "name",
      "variant": "fullName",
      "slug": "name",
      "label": "<string>",
      "placeholder": "<string>",
      "disableOnPrefill": true
    }
  ]
}
'

import requests

url = "https://api.cal.com/v2/event-types/{eventTypeId}/booking-fields"

payload = { "bookingFields": [
        {
            "field": "name",
            "variant": "fullName",
            "slug": "name",
            "label": "<string>",
            "placeholder": "<string>",
            "disableOnPrefill": True
        }
    ] }
headers = {
    "cal-api-version": "<cal-api-version>",
    "Authorization": "<authorization>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {
    'cal-api-version': '<cal-api-version>',
    Authorization: '<authorization>',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    bookingFields: [
      {
        field: 'name',
        variant: 'fullName',
        slug: 'name',
        label: '<string>',
        placeholder: '<string>',
        disableOnPrefill: true
      }
    ]
  })
};

fetch('https://api.cal.com/v2/event-types/{eventTypeId}/booking-fields', 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/event-types/{eventTypeId}/booking-fields",
  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([
    'bookingFields' => [
        [
                'field' => 'name',
                'variant' => 'fullName',
                'slug' => 'name',
                'label' => '<string>',
                'placeholder' => '<string>',
                'disableOnPrefill' => true
        ]
    ]
  ]),
  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/event-types/{eventTypeId}/booking-fields"

	payload := strings.NewReader("{\n  \"bookingFields\": [\n    {\n      \"field\": \"name\",\n      \"variant\": \"fullName\",\n      \"slug\": \"name\",\n      \"label\": \"<string>\",\n      \"placeholder\": \"<string>\",\n      \"disableOnPrefill\": true\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", 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.post("https://api.cal.com/v2/event-types/{eventTypeId}/booking-fields")
  .header("cal-api-version", "<cal-api-version>")
  .header("Authorization", "<authorization>")
  .header("Content-Type", "application/json")
  .body("{\n  \"bookingFields\": [\n    {\n      \"field\": \"name\",\n      \"variant\": \"fullName\",\n      \"slug\": \"name\",\n      \"label\": \"<string>\",\n      \"placeholder\": \"<string>\",\n      \"disableOnPrefill\": true\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cal.com/v2/event-types/{eventTypeId}/booking-fields")

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

request = Net::HTTP::Post.new(url)
request["cal-api-version"] = '<cal-api-version>'
request["Authorization"] = '<authorization>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"bookingFields\": [\n    {\n      \"field\": \"name\",\n      \"variant\": \"fullName\",\n      \"slug\": \"name\",\n      \"label\": \"<string>\",\n      \"placeholder\": \"<string>\",\n      \"disableOnPrefill\": true\n    }\n  ]\n}"

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

{
  "status": "success",
  "data": {
    "bookingFields": [
      {
        "field": "name",
        "slug": "name",
        "variant": "fullName",
        "disableOnPrefill": true,
        "label": "<string>",
        "placeholder": "<string>"
      }
    ]
  }
}