curl -X POST https://api.mycentralino.com/v1/blacklists/SPAM/numbers \
  -H "X-API-KEY: sk_mycentralino_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "number": "0287654321",
    "description": "Call center pubblicitario"
  }'

<?php
$data = [
    'number' => '0287654321',
    'description' => 'Call center pubblicitario'
];

$ch = curl_init('https://api.mycentralino.com/v1/blacklists/SPAM/numbers');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST => true,
    CURLOPT_POSTFIELDS => json_encode($data),
    CURLOPT_HTTPHEADER => [
        'X-API-KEY: sk_mycentralino_your_api_key',
        'Content-Type: application/json'
    ]
]);

$response = curl_exec($ch);
curl_close($ch);

print_r(json_decode($response, true));

import requests

headers = {
    'X-API-KEY': 'sk_mycentralino_your_api_key',
    'Content-Type': 'application/json'
}

data = {
    'number': '0287654321',
    'description': 'Call center pubblicitario'
}

response = requests.post(
    'https://api.mycentralino.com/v1/blacklists/SPAM/numbers',
    headers=headers,
    json=data
)
print(response.json())