You ship the feature. Janus tells you if anyone used it.
Two lines to instrument any app. Connect the MCP to your agent and ask what people did with it.
Free tier. No credit card. First event inside a minute.
1. Instrument your app
<script src="https://addjanus.ca/janus.js"></script><script>Janus.init('jns_your_api_key')</script>
2. Point your agent at the data
claude mcp add janus -- npx -y @janus-analytics/mcp-server> what did people do on my site this week?
Page views and SPA navigation track themselves from that moment on. Custom events are one call.
Built for people who ship.
Janus focuses on usage, not vanity metrics. See how people move through your app. See what they click. See where they stop. Everything is organized so it makes sense the first time you open it.
Makes sense immediately
Live activity, trends over time, user journeys, and a searchable event log. Structured so you don’t need a tutorial to find what matters.
See real journeys
Events are tied to users and sessions. Follow what someone actually did. Not just how many people visited.
No dashboard bloat
Clean charts. Sensible defaults. No overwhelming configuration screens or endless report builders.
Respectful by default.
No invasive fingerprinting. No third-party data resale. You decide what to track and how long to keep it.
Ingest keys are scoped to sending events only, so the key in your client code can't read your data. Full-access keys stay server-side and with your agent.
What you get.
Live Activity
See visitors and events as they happen.
Trends
Event volume over time with clear, readable charts.
Audience
Geography, device, and browser breakdowns.
Behavior
Top pages, events, and usage patterns.
Origin
Referrers and traffic sources.
Event Log
Searchable, filterable history of everything that happened.
AI Agent Access
Query your analytics from Claude Code, Cursor, or Windsurf over MCP.
Ship it with analytics.
Add Janus to your project in minutes. See your first real user today.
Get Started