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Here is what the Fingerprint install actually looks like on a Shopify storefront. You add the SDK to your theme, call it once on page load, and the visitor ID is available before the customer reaches checkout. The SDK is five lines. The API responds in under 4 milliseconds. Your checkout flow does not slow down.
// npm install @fingerprintjs/fingerprintjs-pro
import FingerprintJS from '@fingerprintjs/fingerprintjs-pro';
const fp = await FingerprintJS.load({ apiKey: 'YOUR_KEY' });
const { visitorId, botd } = await fp.get();
// visitorId is stable across sessions, IPs, incognito
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The visitor ID passes into your Shopify webhook, your abuse prevention rules, or your fraud scoring logic. You check it server-side before fulfilling an order, before applying a promo code, or before allowing a cart hold to persist. The device-level signal is what unlocks per-device limits rather than per-session limits.
The SDK is open source with over 21,000 GitHub stars. There is a free trial with no credit card required. You can have a visitor ID flowing through your checkout stack before end of day.
If you want to evaluate it against a real traffic sample before committing, we offer a sandbox with Shopify-specific bot traffic patterns included.
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