curl --request POST \
  --url https://api.sendkit.dev/domains \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "yourdomain.com",
  "region": "us-east-2",
  "open_tracking": true,
  "click_tracking": true,
  "tls": "opportunistic"
}
'

import requests

url = "https://api.sendkit.dev/domains"

payload = {
    "name": "yourdomain.com",
    "region": "us-east-2",
    "open_tracking": True,
    "click_tracking": True,
    "tls": "opportunistic"
}
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({
    name: 'yourdomain.com',
    region: 'us-east-2',
    open_tracking: true,
    click_tracking: true,
    tls: 'opportunistic'
  })
};

fetch('https://api.sendkit.dev/domains', 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.sendkit.dev/domains",
  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' => 'yourdomain.com',
    'region' => 'us-east-2',
    'open_tracking' => true,
    'click_tracking' => true,
    'tls' => 'opportunistic'
  ]),
  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://api.sendkit.dev/domains"

	payload := strings.NewReader("{\n  \"name\": \"yourdomain.com\",\n  \"region\": \"us-east-2\",\n  \"open_tracking\": true,\n  \"click_tracking\": true,\n  \"tls\": \"opportunistic\"\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://api.sendkit.dev/domains")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"name\": \"yourdomain.com\",\n  \"region\": \"us-east-2\",\n  \"open_tracking\": true,\n  \"click_tracking\": true,\n  \"tls\": \"opportunistic\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.sendkit.dev/domains")

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  \"name\": \"yourdomain.com\",\n  \"region\": \"us-east-2\",\n  \"open_tracking\": true,\n  \"click_tracking\": true,\n  \"tls\": \"opportunistic\"\n}"

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

{
  "id": "550e8400-e29b-41d4-a716-446655440000",
  "name": "yourdomain.com",
  "status": "verified",
  "region": "us-east-2",
  "open_tracking": true,
  "click_tracking": true,
  "tls": "opportunistic",
  "sending_enabled": true,
  "dns_records": [
    {
      "id": "550e8400-e29b-41d4-a716-446655440000",
      "record_type": "DKIM",
      "name": "sendkit._domainkey.yourdomain.com",
      "value": "v=DKIM1; k=rsa; p=MIGfMA0...",
      "ttl": 3600,
      "status": "verified",
      "priority": 10,
      "created_at": "2026-03-03 10:00:00",
      "updated_at": "2026-03-03 10:00:00"
    }
  ],
  "created_at": "2026-03-03 10:00:00",
  "updated_at": "2026-03-03 10:00:00"
}

{
  "message": "Invalid API key."
}

{
  "message": "This action is unauthorized."
}

{
  "message": "The email field is required."
}