Janus Client SDK

1. Register an account at addjanus.ca/register 2. Verify your email — this is required before you can generate API keys 3. Go to Settings > API Keys and click "Generate New Key" 4. Enter a name (e.g., "Production Website") and leave the scope on **Ingest** 5. Optionally add allowed origins 6. Copy the key immediately — it is shown only once and cannot be retrieved later Keys start with `jns_` (e.g., `jns_a1b2c3d4e5f6...`). An **Ingest** key can only send events. It cannot read your data or create keys, so it is safe in browser code where anyone can view it. Use **Full access** only for the MCP server or server-side calls, and keep those keys out of anything a browser downloads.

Add the script to your HTML. The SDK is hosted on our CDN:

<script src="https://addjanus.ca/janus.js"></script>

Initialize the SDK with your API key. The endpoint is configured automatically.

Janus.init('jns_your_api_key_here');

Page views are tracked automatically on initialization and during SPA navigation. Track custom events and identify users:

// Track a custom event
Janus.track('button_click', {
    buttonId: 'signup-cta',
    page: 'homepage'
});

// Identify a user
Janus.identify('user_123', {
    email: 'user@example.com',
    plan: 'pro'
});