$ch = curl_init('https://osint.lostingness.site/nexusai.php');
curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_POST           => true,
    CURLOPT_POSTFIELDS     => json_encode([
        'action'   => 'nexusv1',
        'messages' => [['role' => 'user', 'content' => 'Hello!']],
    ]),
    CURLOPT_HTTPHEADER     => ['Content-Type: application/json'],
    CURLOPT_TIMEOUT        => 60,
    CURLOPT_SSL_VERIFYPEER => false,
]);
$res  = curl_exec($ch);
curl_close($ch);
$data = json_decode($res, true);
echo $data['content'];

const res = await fetch('https://osint.lostingness.site/nexusai.php', {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    action: 'nexusv1',
    messages: [{role: 'user', content: 'What is AI?'}]
  })
});
const data = await res.json();
console.log(data.content);

import requests

res = requests.post('https://osint.lostingness.site/nexusai.php', json={
    'action': 'nexusv1',
    'messages': [{'role': 'user', 'content': 'Explain Python asyncio'}]
}, timeout=60)

data = res.json()
print(data['content'])