curl --request POST \
  --url https://api.everhour.com/projects/{project_id}/fields \
  --header 'Content-Type: application/json' \
  --header 'X-Api-Key: <api-key>' \
  --data '
{
  "name": "field name",
  "type": "select",
  "format": {
    "decimals": 2,
    "label": "US$"
  },
  "icon": "<string>",
  "options": [
    {
      "id": 806,
      "name": "option value",
      "color": "#FC5500"
    }
  ]
}
'

import requests

url = "https://api.everhour.com/projects/{project_id}/fields"

payload = {
    "name": "field name",
    "type": "select",
    "format": {
        "decimals": 2,
        "label": "US$"
    },
    "icon": "<string>",
    "options": [
        {
            "id": 806,
            "name": "option value",
            "color": "#FC5500"
        }
    ]
}
headers = {
    "X-Api-Key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {'X-Api-Key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    name: 'field name',
    type: 'select',
    format: {decimals: 2, label: 'US$'},
    icon: '<string>',
    options: [{id: 806, name: 'option value', color: '#FC5500'}]
  })
};

fetch('https://api.everhour.com/projects/{project_id}/fields', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.everhour.com/projects/{project_id}/fields",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'name' => 'field name',
    'type' => 'select',
    'format' => [
        'decimals' => 2,
        'label' => 'US$'
    ],
    'icon' => '<string>',
    'options' => [
        [
                'id' => 806,
                'name' => 'option value',
                'color' => '#FC5500'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json",
    "X-Api-Key: <api-key>"
  ],
]);

$response = curl_exec($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.everhour.com/projects/{project_id}/fields"

	payload := strings.NewReader("{\n  \"name\": \"field name\",\n  \"type\": \"select\",\n  \"format\": {\n    \"decimals\": 2,\n    \"label\": \"US$\"\n  },\n  \"icon\": \"<string>\",\n  \"options\": [\n    {\n      \"id\": 806,\n      \"name\": \"option value\",\n      \"color\": \"#FC5500\"\n    }\n  ]\n}")

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

	req.Header.Add("X-Api-Key", "<api-key>")
	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.everhour.com/projects/{project_id}/fields")
  .header("X-Api-Key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"field name\",\n  \"type\": \"select\",\n  \"format\": {\n    \"decimals\": 2,\n    \"label\": \"US$\"\n  },\n  \"icon\": \"<string>\",\n  \"options\": [\n    {\n      \"id\": 806,\n      \"name\": \"option value\",\n      \"color\": \"#FC5500\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.everhour.com/projects/{project_id}/fields")

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

request = Net::HTTP::Post.new(url)
request["X-Api-Key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"name\": \"field name\",\n  \"type\": \"select\",\n  \"format\": {\n    \"decimals\": 2,\n    \"label\": \"US$\"\n  },\n  \"icon\": \"<string>\",\n  \"options\": [\n    {\n      \"id\": 806,\n      \"name\": \"option value\",\n      \"color\": \"#FC5500\"\n    }\n  ]\n}"

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

{
  "id": 406,
  "name": "field name",
  "type": "date",
  "format": {
    "decimals": 2,
    "label": "US$"
  },
  "options": [
    {
      "id": 806,
      "name": "option value",
      "color": "#FC5500"
    }
  ],
  "position": 1,
  "icon": "<string>"
}