Effortless Observability,
Zero Boilerplate.

A production-grade instrumentation toolkit providing Express, NestJS, Fastify & Koa telemetry, Prometheus metrics, structured Winston JSON logs, and mountable React & Next.js admin dashboards.

Telemetry Stream

EXPRESS200 OKGET /api/v1/telemetry/stats(1.2ms • gzip 3.8kb)

Realtime

Explore Documentation

Launch Demo Console

npx stacklenzz dashboard -y

The Stacklenzz Ecosystem

Everything you need for backend instrumentation, dashboard rendering, AI context, and tooling.

@stacklenzz/server

Plug-and-play middleware for Express, NestJS, Fastify, & Koa. Prometheus /metrics, Winston logs, OTEL traces, Slack/Discord alerts, and SLOs.

Express & NestJS 1-line setup
Fastify & Koa adapters
Zero-cost Webhook Alerts & SLOs

SDK Documentation

@stacklenzz/ui

Embeddable React dashboard with Trace Waterfall UI, SLO & Error Budget Cards, Background Job Monitoring, and 6 runtime color themes.

Trace Waterfall & SLO Cards
Jobs & Queue Monitoring
6 Theme Switchers

UI Component Docs

@stacklenzz/mcp

Agentic AI integration via Model Context Protocol (MCP). Connect Cursor, Windsurf, or Claude Desktop to your live backend telemetry.

Live telemetry queries for AI
Crash log & stack trace analysis
Cursor & Claude Desktop ready

MCP Integration Docs

@stacklenzz/cli

Command-line companion for developer happiness. Auto-detects Next.js App/Pages router and scaffolds dashboard routes with 1 command.

stacklenzz dashboard - Auto-scaffold
stacklenzz doctor - Health check
Zero extra configuration required

CLI Reference

server.ts

listening :5000

View Full DocsDocs

import express from "express";
import { setupObservability, addBreadcrumb } from "@stacklenzz/server";

const app = express();

// 1. One line adds Prometheus metrics, OTEL tracing, Winston logs & stats API
setupObservability(app, {
  serviceName: "payment-service",
  environment: "production",
});

// 2. Track custom business breadcrumbs on any route
app.post("/api/checkout", async (req, res) => {
  addBreadcrumb({ category: "billing", message: "Processing card payment" });
  res.json({ status: "confirmed" });
});

app.listen(5000, () => console.log("🚀 Server running on port 5000"));

Ready to monitor your application?

Browse the interactive documentation for copy-paste examples, CLI commands, and complete SDK reference.

Go to Documentation

View Live Demo

Stacklenzz • Apache 2.0 Licensed • Built with Node.js & React