Every backend developer has this headache 😩

Every time you start a new backend project, you end up writing the same monitoring code:

counter.inc()
histogram.observe()

Manual metrics. Repeated setup. Boilerplate everywhere.

All this just to answer basic questions:

Which API is slow?
Why are errors increasing?
What’s happening in production?

And the worst part — you repeat this in every project.

🚀 Introducing: prometheus-auto-instrument

So I built something to remove this completely.

prometheus-auto-instrument is a zero-config monitoring tool for Node.js.

👉 Just one line:

monitor.init({ app });

And you instantly get:

• Automatic request metrics
• Smart route grouping (/users/:id instead of thousands of unique routes)
• Auto-detection for MongoDB and Redis
• Built-in live dashboard (no Grafana required)
• Real-time updates using WebSocket
• Latency anomaly detection
• Per-route performance insights

💡 The Idea

Monitoring should be automatic,
not something developers rewrite every time.

Instead of forcing developers to manually wire metrics,
the system should understand the app and instrument itself.

🧪 Stress Testing

I tested this using k6 load testing.

As requests increased:

• metrics updated in real-time
• errors were tracked correctly
• latency spikes were detected automatically

All visible directly in the dashboard 👀

📊 Built-in Dashboard

No need to configure Prometheus + Grafana manually.

You get:

• live request rate
• latency trends
• error tracking
• per-route insights

All out of the box.

📦 Try it yourself

👉 NPM package:
https://www.npmjs.com/package/prometheus-auto-instrument?activeTab=readme

npm i prometheus-auto-instrument

🧪 Demo Repository

You can test everything easily using this example repo:

👉 https://github.com/DavePujan/prometheus-demo-repo

🔗 GitHub

👉 https://github.com/DavePujan/prometheus-auto-instrument

🧠 What’s next?

This is just the beginning.

Planned improvements:

• deeper database auto-detection
• advanced anomaly detection
• better UI dashboards
• more integrations

🙌 Feedback

Would love to hear your thoughts.

What feature would you want next?
What’s missing in current monitoring tools?
⚡ Final Thought

We don’t need to keep rewriting monitoring logic.

It should just work.