curl --request POST \
  --url https://app.alvahq.com/api/v1/custom-fields \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "entityType": "company",
  "label": "Account Tier",
  "fieldType": "select",
  "options": [
    "Bronze",
    "Silver",
    "Gold"
  ],
  "required": false,
  "helpText": ""
}
'

import requests

url = "https://app.alvahq.com/api/v1/custom-fields"

payload = {
    "entityType": "company",
    "label": "Account Tier",
    "fieldType": "select",
    "options": ["Bronze", "Silver", "Gold"],
    "required": False,
    "helpText": ""
}
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({
    entityType: 'company',
    label: 'Account Tier',
    fieldType: 'select',
    options: ['Bronze', 'Silver', 'Gold'],
    required: false,
    helpText: ''
  })
};

fetch('https://app.alvahq.com/api/v1/custom-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://app.alvahq.com/api/v1/custom-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([
    'entityType' => 'company',
    'label' => 'Account Tier',
    'fieldType' => 'select',
    'options' => [
        'Bronze',
        'Silver',
        'Gold'
    ],
    'required' => false,
    'helpText' => ''
  ]),
  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://app.alvahq.com/api/v1/custom-fields"

	payload := strings.NewReader("{\n  \"entityType\": \"company\",\n  \"label\": \"Account Tier\",\n  \"fieldType\": \"select\",\n  \"options\": [\n    \"Bronze\",\n    \"Silver\",\n    \"Gold\"\n  ],\n  \"required\": false,\n  \"helpText\": \"\"\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://app.alvahq.com/api/v1/custom-fields")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"entityType\": \"company\",\n  \"label\": \"Account Tier\",\n  \"fieldType\": \"select\",\n  \"options\": [\n    \"Bronze\",\n    \"Silver\",\n    \"Gold\"\n  ],\n  \"required\": false,\n  \"helpText\": \"\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.alvahq.com/api/v1/custom-fields")

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  \"entityType\": \"company\",\n  \"label\": \"Account Tier\",\n  \"fieldType\": \"select\",\n  \"options\": [\n    \"Bronze\",\n    \"Silver\",\n    \"Gold\"\n  ],\n  \"required\": false,\n  \"helpText\": \"\"\n}"

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

{
  "success": true,
  "message": "<string>",
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "entityType": "company",
    "key": "account_tier",
    "label": "Account Tier",
    "fieldType": "text",
    "options": [
      "<string>"
    ],
    "required": true,
    "defaultValue": "<unknown>",
    "helpText": "<string>",
    "sortOrder": 123,
    "isArchived": true
  },
  "resource": "<string>"
}

{
  "error": "Unauthorised",
  "message": "Invalid or revoked API key"
}

{
  "error": "Unprocessable Entity",
  "message": "Validation failed",
  "details": {
    "name": [
      "Name is required"
    ]
  }
}