curl --request POST \
  --url https://dvs.idmetagroup.com/api/DVS/certificate/marriage \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "FamilyName": "Smith",
  "GivenName": "John",
  "DateOfEvent": {
    "Day": 15,
    "Month": 3,
    "Year": 1990
  },
  "RegistrationNumber": "123456",
  "RegistrationState": "NSW",
  "RegistrationDate": "2018-08-25",
  "CertificateNumber": "987654321"
}
'

import requests

url = "https://dvs.idmetagroup.com/api/DVS/certificate/marriage"

payload = {
    "FamilyName": "Smith",
    "GivenName": "John",
    "DateOfEvent": {
        "Day": 15,
        "Month": 3,
        "Year": 1990
    },
    "RegistrationNumber": "123456",
    "RegistrationState": "NSW",
    "RegistrationDate": "2018-08-25",
    "CertificateNumber": "987654321"
}
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({
    FamilyName: 'Smith',
    GivenName: 'John',
    DateOfEvent: {Day: 15, Month: 3, Year: 1990},
    RegistrationNumber: '123456',
    RegistrationState: 'NSW',
    RegistrationDate: '2018-08-25',
    CertificateNumber: '987654321'
  })
};

fetch('https://dvs.idmetagroup.com/api/DVS/certificate/marriage', 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://dvs.idmetagroup.com/api/DVS/certificate/marriage",
  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([
    'FamilyName' => 'Smith',
    'GivenName' => 'John',
    'DateOfEvent' => [
        'Day' => 15,
        'Month' => 3,
        'Year' => 1990
    ],
    'RegistrationNumber' => '123456',
    'RegistrationState' => 'NSW',
    'RegistrationDate' => '2018-08-25',
    'CertificateNumber' => '987654321'
  ]),
  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://dvs.idmetagroup.com/api/DVS/certificate/marriage"

	payload := strings.NewReader("{\n  \"FamilyName\": \"Smith\",\n  \"GivenName\": \"John\",\n  \"DateOfEvent\": {\n    \"Day\": 15,\n    \"Month\": 3,\n    \"Year\": 1990\n  },\n  \"RegistrationNumber\": \"123456\",\n  \"RegistrationState\": \"NSW\",\n  \"RegistrationDate\": \"2018-08-25\",\n  \"CertificateNumber\": \"987654321\"\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://dvs.idmetagroup.com/api/DVS/certificate/marriage")
  .header("x-api-key", "<api-key>")
  .header("Content-Type", "application/json")
  .body("{\n  \"FamilyName\": \"Smith\",\n  \"GivenName\": \"John\",\n  \"DateOfEvent\": {\n    \"Day\": 15,\n    \"Month\": 3,\n    \"Year\": 1990\n  },\n  \"RegistrationNumber\": \"123456\",\n  \"RegistrationState\": \"NSW\",\n  \"RegistrationDate\": \"2018-08-25\",\n  \"CertificateNumber\": \"987654321\"\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://dvs.idmetagroup.com/api/DVS/certificate/marriage")

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  \"FamilyName\": \"Smith\",\n  \"GivenName\": \"John\",\n  \"DateOfEvent\": {\n    \"Day\": 15,\n    \"Month\": 3,\n    \"Year\": 1990\n  },\n  \"RegistrationNumber\": \"123456\",\n  \"RegistrationState\": \"NSW\",\n  \"RegistrationDate\": \"2018-08-25\",\n  \"CertificateNumber\": \"987654321\"\n}"

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