npm install @keverdjs/agent

const keverdPromise = import(
  'https://cdn.keverd.com/v1/YOUR_PUBLIC_API_KEY/keverd.min.js'
).then((Keverd) => Keverd.start());

keverdPromise
  .then((k) => k.getVisitorData())
  .then((r) => {
    console.log(r.event_id || r.requestId); // billable event id — send to your server
    console.log(r.visitor_id || r.visitorId);  // persistent device id
  });

<script type="module">
  const keverd = await import(
    'https://cdn.keverd.com/v1/kv_pk_live_…/keverd.min.js'
  ).then((m) => m.start());

  const result = await keverd.getVisitorData();
  await fetch('/api/keverd/verify', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ eventId: result.requestId || result.event_id }),
  });
</script>

import { Keverd } from '@keverdjs/agent';

Keverd.init('kv_pk_live_…');
// or
Keverd.init({
  apiKey: 'kv_pk_test_…',
  endpoint: 'https://api.keverd.com',
});

const result = await Keverd.getVisitorData();

console.log(result.visitor_id); // persistent device id
console.log(result.event_id);   // send to your server
console.log(result.risk_score); // UI hint only
console.log(result.browser);    // e.g. "Chrome"

{
  "visitor_id": "kvd_…",
  "event_id": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "risk_score": 12,
  "browser": "Chrome",
  "visitorId": "kvd_…",
  "requestId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
  "session_id": "kvd_…"
}

{
  "eventId": "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
}

await Keverd.verifyLogin({ /* … */ });
await Keverd.verifyCheckout(amount, currency);
await Keverd.verifyRegistration();
await Keverd.verifyPasswordReset();
await Keverd.verifyAccountChange();