Node.js license key system

License checking in a few lines

const { LicenseClient } = require('./licenseClient');

const client = new LicenseClient({
  baseUrl: 'https://license.foliox.sbs',
  product: 'my-tool',
  publicKeyB64: PUBLIC_KEY, // from /api/v1/public-key
});

// activates on first run, verifies on every run after
const result = await client.check(licenseKey);
if (!result.valid) {
  throw new Error('Not licensed: ' + result.reason);
}

Get started

1. Create a free account, add a product, and generate a key.
2. Get the Node.js client and its full guide: Node.js SDK docs.
3. Copy the public key from /api/v1/public-key into your app — the SDK uses it to verify every answer.
4. Call check() with the customer’s key as shown above.

Why this SDK

• Uses Node’s built-in crypto for Ed25519 — nothing extra to install.
• Suits CLI tools, servers, Electron and packaged apps.
• Pair it with the automation API to create keys from your checkout webhook.

Prefer plain HTTP? See the licensing API and the API reference. Device locking works through a hashed machine ID — here’s how.