Create a custom field definition

curl --request POST \
  --url https://app.gomangrove.com/api/v1/custom_field_definitions \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "custom_field_definition": {
    "label": "Status",
    "value_type": "enum",
    "object_type": "asset",
    "enumeration_options": [
      "Unregistered",
      "Registered",
      "Inactive"
    ]
  }
}
'

import requests

url = "https://app.gomangrove.com/api/v1/custom_field_definitions"

payload = { "custom_field_definition": {
        "label": "Status",
        "value_type": "enum",
        "object_type": "asset",
        "enumeration_options": ["Unregistered", "Registered", "Inactive"]
    } }
headers = {
    "Authorization": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    custom_field_definition: {
      label: 'Status',
      value_type: 'enum',
      object_type: 'asset',
      enumeration_options: ['Unregistered', 'Registered', 'Inactive']
    }
  })
};

fetch('https://app.gomangrove.com/api/v1/custom_field_definitions', 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.gomangrove.com/api/v1/custom_field_definitions",
  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([
    'custom_field_definition' => [
        'label' => 'Status',
        'value_type' => 'enum',
        'object_type' => 'asset',
        'enumeration_options' => [
                'Unregistered',
                'Registered',
                'Inactive'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: <api-key>",
    "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.gomangrove.com/api/v1/custom_field_definitions"

	payload := strings.NewReader("{\n  \"custom_field_definition\": {\n    \"label\": \"Status\",\n    \"value_type\": \"enum\",\n    \"object_type\": \"asset\",\n    \"enumeration_options\": [\n      \"Unregistered\",\n      \"Registered\",\n      \"Inactive\"\n    ]\n  }\n}")

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

	req.Header.Add("Authorization", "<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://app.gomangrove.com/api/v1/custom_field_definitions")
  .header("Authorization", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"custom_field_definition\": {\n    \"label\": \"Status\",\n    \"value_type\": \"enum\",\n    \"object_type\": \"asset\",\n    \"enumeration_options\": [\n      \"Unregistered\",\n      \"Registered\",\n      \"Inactive\"\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.gomangrove.com/api/v1/custom_field_definitions")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"custom_field_definition\": {\n    \"label\": \"Status\",\n    \"value_type\": \"enum\",\n    \"object_type\": \"asset\",\n    \"enumeration_options\": [\n      \"Unregistered\",\n      \"Registered\",\n      \"Inactive\"\n    ]\n  }\n}"

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

{
  "id": 43,
  "friendly_id": "cfd_def456abc123",
  "key": "status",
  "label": "Status",
  "object_type": "asset",
  "value_type": "enum",
  "enumeration_options": [
    "Unregistered",
    "Registered",
    "Inactive"
  ],
  "order": 2,
  "is_required": false,
  "project_id": null,
  "created_at": "2026-01-15T10:00:00.000Z",
  "updated_at": "2026-01-15T10:00:00.000Z"
}

{
  "errors": [
    {
      "message": "Label has already been taken"
    }
  ]
}