Rupt JavaScript SDK

Device intelligence and account security for browsers. This SDK powers account-sharing detection, fake-account prevention, and account-takeover protection.

• Documentation

Installation

yarn add @ruptjs/client

or with npm:

npm install --save @ruptjs/client

Import & instantiate

import Rupt from "@ruptjs/client";

const rupt = new Rupt({
  clientId: "your-client-id",
  on_logout(event) {
    // Server kicked this session — sign out locally.
    window.location.href = "/login";
  },
});

Evaluate

The SDK has one unified entry point — rupt.evaluate — with hardcoded methods for the three canonical events and a free-string overload for custom events.

Access (every protected route)

Call on every page once the user is authenticated. Starts the kick / logout listener.

await rupt.evaluate.access({
  user: "user-id",
  email: "[email protected]",
});

Login

await rupt.evaluate.login({
  user: "user-id",
  email: "[email protected]",
});

Signup

await rupt.evaluate.signup({
  user: "user-id",
  email: "[email protected]",
});

Custom events

await rupt.evaluate("checkout", {
  user: "user-id",
  metadata: { cart_id: "abc-123" },
});

Reserved actions (access, login, signup, warm, fingerprint) cannot be used as free-string events — use the hardcoded methods instead.

Fingerprint only

Resolve a browser-stable fingerprint without going through the full evaluate flow — handy for tests and lightweight integrations.

const { fingerprint_id, confidence } = await rupt.fingerprint();