curl --request POST \
  --url https://api.dexnotify.com/api/v1/contact-groups/{groupId}/contacts \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '
{
  "firstName": "<string>",
  "lastName": "<string>",
  "name": "<string>",
  "email": "<string>",
  "phone": "<string>",
  "address": {
    "line": "<string>",
    "city": "<string>",
    "country": "<string>"
  },
  "attributes": {},
  "tags": [],
  "listIds": [],
  "subscriptions": {}
}
'

const options = {
  method: 'POST',
  headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    firstName: '<string>',
    lastName: '<string>',
    name: '<string>',
    email: '<string>',
    phone: '<string>',
    address: {line: '<string>', city: '<string>', country: '<string>'},
    attributes: {},
    tags: [],
    listIds: [],
    subscriptions: {}
  })
};

fetch('https://api.dexnotify.com/api/v1/contact-groups/{groupId}/contacts', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.dexnotify.com/api/v1/contact-groups/{groupId}/contacts"

payload = {
    "firstName": "<string>",
    "lastName": "<string>",
    "name": "<string>",
    "email": "<string>",
    "phone": "<string>",
    "address": {
        "line": "<string>",
        "city": "<string>",
        "country": "<string>"
    },
    "attributes": {},
    "tags": [],
    "listIds": [],
    "subscriptions": {}
}
headers = {
    "x-api-key": "<api-key>",
    "Content-Type": "application/json"
}

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

print(response.text)

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.dexnotify.com/api/v1/contact-groups/{groupId}/contacts",
  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([
    'firstName' => '<string>',
    'lastName' => '<string>',
    'name' => '<string>',
    'email' => '<string>',
    'phone' => '<string>',
    'address' => [
        'line' => '<string>',
        'city' => '<string>',
        'country' => '<string>'
    ],
    'attributes' => [
        
    ],
    'tags' => [
        
    ],
    'listIds' => [
        
    ],
    'subscriptions' => [
        
    ]
  ]),
  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;
}