Quick start

Live in under 5 minutes.

Paste one snippet into your page. The sandbox key below gives you live signals immediately — no signup required.

Sandbox tenant key

lx_demo_f35d9a9ff473ba61e4648063

Free · 1,000 calls · Real signals · Results at app.leonix.io

Paste before </body>

<script
  src="https://cdn.leonix.io/fraudwidgetV1.js"
  data-tenant-key="lx_demo_f35d9a9ff473ba61e4648063"
  data-api-base="https://fraud-engine-prod-v3-794477191755.us-central1.run.app"
  data-fpjs-public-key="lybk8D8ZmpCZhhwO8gvZ"
  data-fpjs-endpoint="https://cdn.leonix.io/fpjs">
</script>

Optional — react to the decision

Listen for fraudengine:ready to take action on your page.

Listen for result

window.addEventListener('fraudengine:ready', (e) => {
  const { decision, score, reasons } = e.detail;

  if (decision === 'block') {
    // hide checkout, redirect, etc.
  }
  if (decision === 'review') {
    // trigger step-up auth
  }
});

Response shape

{
  "decision": "block",
  "risk_score": 0.92,
  "reasons": [
    "R24_BAD_BOT",
    "R28_ANTI_DETECT_OR_NODRIVER"
  ],
  "agent": {
    "scenario_type": "bot_signup",
    "severity": "critical",
    "recommended_action": "block_and_flag"
  }
}