NodeGuard

SaaS platform that automatically scans Node.js microservice repositories to detect distributed systems anti-patterns (hardcoded URLs, missing circuit breakers, tight coupling) and generates actionable refactoring suggestions

Built for: Backend engineers, tech leads, and DevOps teams managing Node.js microservice architectures at scale (10+ services)

🚀 Live Demo • 📦 GitHub • 🐛 Report Bug • 💡 Request Feature

⚠️ What's Built vs What's Left

This MVP was autonomously generated by MVP Factory v11 using a free-tier AI API (NVIDIA / Kimi K2.5). Simple logic runs for real. Complex external dependencies are stubbed so the app always works.

What's real and working right now:

Layer	What it does
✅ Frontend UI	Fully interactive — forms submit, responses render, auth guard works
✅ Input validation	Every API route checks required fields, returns 400 on bad input
✅ Calculations & scoring	Algorithms (risk scores, percentages, rankings, text analysis) run in pure TypeScript
✅ Rule-based logic	Classification, tier detection, flag rules — all real code
✅ Auth flow	Email+password client validation → localStorage token → dashboard guard

What's stubbed and why:

Feature	Current State	Why it's stubbed	How to fix it
🗄️ Database persistence	In-memory arrays (resets on restart)	No DB provisioned in free tier	See Step 1 below
🤖 AI/LLM responses	Hardcoded plausible strings	NVIDIA free API has strict rate limits during bulk builds	See Step 2 below
🔐 Real authentication	localStorage demo token	No JWT/session infra provisioned	See Step 3 below
📧 Email / notifications	Logged + returns `{sent: true}`	No email service configured	See Step 4 below
💳 Payments	Returns demo status	Stripe not configured	See Step 5 below

Step 1 — Add a real database (15 min setup)

# Option A: Supabase (Postgres, free tier)
npm install @supabase/supabase-js
# In each route: import { createClient } from '@supabase/supabase-js'
# Replace the mock array with: const { data } = await supabase.from('table').select()

# Option B: PlanetScale (MySQL, free tier)
npm install @planetscale/database

Look for // TODO: replace with DB comments in src/app/api/**/route.ts

Step 2 — Enable real AI responses

// In any API route, replace the hardcoded AI string with:
const res = await fetch('https://integrate.api.nvidia.com/v1/chat/completions', {
  method: 'POST',
  headers: { 'Authorization': `Bearer ${process.env.NVIDIA_API_KEY}`,
             'Content-Type': 'application/json' },
  body: JSON.stringify({
    model: 'moonshotai/kimi-k2.5',
    messages: [{ role: 'user', content: yourPrompt }],
    max_tokens: 1024
  })
});
const { choices } = await res.json();
return NextResponse.json({ result: choices[0].message.content });

Add NVIDIA_API_KEY=your_key to .env.local

Step 3 — Replace demo auth with real sessions (NextAuth.js)

npm install next-auth
# 1. Create src/app/api/auth/[...nextauth]/route.ts with your provider
# 2. Replace localStorage.setItem("auth_token",...) in auth/page.tsx with signIn()
# 3. Replace localStorage.getItem("auth_token") in dashboard/page.tsx with useSession()

Step 4 — Add email (Resend — free 3000 emails/mo)

npm install resend
# Replace the { sent: true } mock in notification routes with:
# await resend.emails.send({ from: 'you@domain.com', to: email, subject, html })

Step 5 — Add payments (Stripe)

npm install stripe @stripe/stripe-js
# Replace demo payment routes with real Stripe checkout sessions

All the UI is already wired up. Every form already calls the right API route. You only need to swap the stubbed returns for real implementations.

🎯 The Problem

Development teams running 30+ Node.js microservices repeatedly ship the same architectural anti-patterns—hardcoded service URLs, missing circuit breakers, insufficient health checks—causing cascading production failures that could be prevented with automated architectural linting

❌ Production outages caused by missing circuit breakers during downstream service failures
❌ Manual code review bottlenecks when onboarding new microservices
❌ Inconsistent architectural standards across 30+ services
❌ Hardcoded URLs breaking when services move or scale

✨ Features

🔥 Feature 1

AST-based static analysis engine that parses JS/TS files to detect hardcoded HTTP URLs and service endpoints outside of config files

⚡ Feature 2

Circuit breaker pattern detection analyzing package.json for resilience libraries (opossum, resilience4j) and verifying implementation in HTTP client code

🎨 Feature 3

Health check validation scanning Express/Fastify/NestJS route definitions to ensure proper /health and /ready endpoints exist with correct response formats

🔐 Feature 4

Cross-service coupling analyzer building dependency graphs from import statements to identify tight coupling between domains

📊 Feature 5

GitHub/GitLab PR integration that automatically comments with specific file-level refactoring suggestions and severity scores

🔧 Implementation Guide

A step-by-step breakdown of how each feature is built. Use this as your dev roadmap.

🔥 1. AST-based static analysis engine that parses JS/TS files to detect hardcoded HTTP URLs and service endpoints outside of config files

What it does: AST-based static analysis engine that parses JS/TS files to detect hardcoded HTTP URLs and service endpoints outside of config files

How to implement:

Step	What to do
1. API Route	Create `src/app/api/ast-based-static-analysis-engine-that-parses-js-ts-files-to-detect-hardcoded-http-urls-and-service-endpoints-outside-of-config-files/route.ts` with a POST handler
2. Input Schema	Accept `{ userId?, ...featureParams }` in the request body
3. Server Logic	Process the request, call external APIs if needed, return JSON
4. UI Component	Create `src/components/ASTbasedstaticanalysisenginethatparsesJSTSfilestodetecthardcodedHTTPURLsandserviceendpointsoutsideofconfigfilesSection.tsx`
5. Wire up	Call `/api/ast-based-static-analysis-engine-that-parses-js-ts-files-to-detect-hardcoded-http-urls-and-service-endpoints-outside-of-config-files` from the component using `fetch` on form submit

Potential enhancements:

⚡ Cache repeated lookups with unstable_cache or Redis
🔒 Add rate limiting to /api/ast-based-static-analysis-engine-that-parses-js-ts-files-to-detect-hardcoded-http-urls-and-service-endpoints-outside-of-config-files (e.g. Upstash Ratelimit)
📱 Make the UI section responsive-first (mobile breakpoints)
📊 Log feature usage to analytics (Plausible / PostHog)
🧪 Add an integration test for the API route

⚡ 2. Circuit breaker pattern detection analyzing package.json for resilience libraries

What it does: Circuit breaker pattern detection analyzing package.json for resilience libraries (opossum, resilience4j) and verifying implementation in HTTP client code

How to implement:

Step	What to do
1. API Route	Create `src/app/api/circuit-breaker-pattern-detection-analyzing-package-json-for-resilience-libraries/route.ts` with a POST handler
2. Input Schema	Accept `{ userId?, ...featureParams }` in the request body
3. Server Logic	Process the request, call external APIs if needed, return JSON
4. UI Component	Create `src/components/CircuitbreakerpatterndetectionanalyzingpackagejsonforresiliencelibrariesSection.tsx`
5. Wire up	Call `/api/circuit-breaker-pattern-detection-analyzing-package-json-for-resilience-libraries` from the component using `fetch` on form submit

Potential enhancements:

⚡ Cache repeated lookups with unstable_cache or Redis
🔒 Add rate limiting to /api/circuit-breaker-pattern-detection-analyzing-package-json-for-resilience-libraries (e.g. Upstash Ratelimit)
📱 Make the UI section responsive-first (mobile breakpoints)
📊 Log feature usage to analytics (Plausible / PostHog)
🧪 Add an integration test for the API route

🎨 3. Health check validation scanning Express/Fastify/NestJS route definitions to ensure proper /health and /ready endpoints exist with correct response formats

What it does: Health check validation scanning Express/Fastify/NestJS route definitions to ensure proper /health and /ready endpoints exist with correct response formats

How to implement:

Step	What to do
1. API Route	Create `src/app/api/health-check-validation-scanning-express-fastify-nestjs-route-definitions-to-ensure-proper-health-and-ready-endpoints-exist-with-correct-response-formats/route.ts` with a POST handler
2. Input Schema	Accept `{ userId?, ...featureParams }` in the request body
3. Server Logic	Process the request, call external APIs if needed, return JSON
4. UI Component	Create `src/components/HealthcheckvalidationscanningExpressFastifyNestJSroutedefinitionstoensureproperhealthandreadyendpointsexistwithcorrectresponseformatsSection.tsx`
5. Wire up	Call `/api/health-check-validation-scanning-express-fastify-nestjs-route-definitions-to-ensure-proper-health-and-ready-endpoints-exist-with-correct-response-formats` from the component using `fetch` on form submit

Potential enhancements:

⚡ Cache repeated lookups with unstable_cache or Redis
🔒 Add rate limiting to /api/health-check-validation-scanning-express-fastify-nestjs-route-definitions-to-ensure-proper-health-and-ready-endpoints-exist-with-correct-response-formats (e.g. Upstash Ratelimit)
📱 Make the UI section responsive-first (mobile breakpoints)
📊 Log feature usage to analytics (Plausible / PostHog)
🧪 Add an integration test for the API route

🔐 4. Cross-service coupling analyzer building dependency graphs from import statements to identify tight coupling between domains

What it does: Cross-service coupling analyzer building dependency graphs from import statements to identify tight coupling between domains

How to implement:

Step	What to do
1. API Route	Create `src/app/api/cross-service-coupling-analyzer-building-dependency-graphs-from-import-statements-to-identify-tight-coupling-between-domains/route.ts` with a POST handler
2. Input Schema	Accept `{ userId?, ...featureParams }` in the request body
3. Server Logic	Process the request, call external APIs if needed, return JSON
4. UI Component	Create `src/components/CrossservicecouplinganalyzerbuildingdependencygraphsfromimportstatementstoidentifytightcouplingbetweendomainsSection.tsx`
5. Wire up	Call `/api/cross-service-coupling-analyzer-building-dependency-graphs-from-import-statements-to-identify-tight-coupling-between-domains` from the component using `fetch` on form submit

Potential enhancements:

⚡ Cache repeated lookups with unstable_cache or Redis
🔒 Add rate limiting to /api/cross-service-coupling-analyzer-building-dependency-graphs-from-import-statements-to-identify-tight-coupling-between-domains (e.g. Upstash Ratelimit)
📱 Make the UI section responsive-first (mobile breakpoints)
📊 Log feature usage to analytics (Plausible / PostHog)
🧪 Add an integration test for the API route

📊 5. GitHub/GitLab PR integration that automatically comments with specific file-level refactoring suggestions and severity scores

What it does: GitHub/GitLab PR integration that automatically comments with specific file-level refactoring suggestions and severity scores

How to implement:

Step	What to do
1. API Route	Create `src/app/api/github-gitlab-pr-integration-that-automatically-comments-with-specific-file-level-refactoring-suggestions-and-severity-scores/route.ts` with a POST handler
2. Input Schema	Accept `{ userId?, ...featureParams }` in the request body
3. Server Logic	Process the request, call external APIs if needed, return JSON
4. UI Component	Create `src/components/GitHubGitLabPRintegrationthatautomaticallycommentswithspecificfilelevelrefactoringsuggestionsandseverityscoresSection.tsx`
5. Wire up	Call `/api/github-gitlab-pr-integration-that-automatically-comments-with-specific-file-level-refactoring-suggestions-and-severity-scores` from the component using `fetch` on form submit

Potential enhancements:

⚡ Cache repeated lookups with unstable_cache or Redis
🔒 Add rate limiting to /api/github-gitlab-pr-integration-that-automatically-comments-with-specific-file-level-refactoring-suggestions-and-severity-scores (e.g. Upstash Ratelimit)
📱 Make the UI section responsive-first (mobile breakpoints)
📊 Log feature usage to analytics (Plausible / PostHog)
🧪 Add an integration test for the API route

🏗️ How It Works

User Request
      │
      ▼
  Next.js Edge ──► API Route ──► Business Logic ──► Data Store
      │                               │
  React UI ◄────────────────── Response / JSON
      │
  Real-time UI Update

🎯 Who Is This For?

Attribute	Details
Audience	Backend engineers, tech leads, and DevOps teams managing Node.js microservice architectures at scale (10+ services)
Tech Level	🟢 High
Pain Level	High
Motivations	Preventing 3am production pages • Reducing technical debt across service boundaries
Price Willingness	premium

🧪 Validation Results

MVP Factory Validation Report — 2026-03-03
═══════════════════════════════════════════════════════

✅ PASS  Market Demand             ████████░░ 8/10
✅ PASS  Competition Gap           ████████░░ 8/10
✅ PASS  Technical Feasibility     █████████░ 9/10
✅ PASS  Monetization Potential    ███████░░░ 7/10
✅ PASS  Audience Fit              █████████░ 9/10

─────────────────────────────────────────────────────
         OVERALL SCORE  ████████░░ 8.2/10
         VERDICT        🟢 BUILD — Strong market opportunity
         TESTS PASSED   5/5
═══════════════════════════════════════════════════════

Why this works: Strong Reddit validation (420 upvotes) proves immediate demand. While general static analysis tools exist, none specifically target distributed systems anti-patterns like circuit breakers and service coupling. High technical feasibility with AST parsing. Clear B2B monetization path via team features and CI integration. Score of 8.15 exceeds 8.0 threshold with competition gap >= 7.

Unique angle: 💡 The only tool specifically architected for Node.js microservice anti-patterns—detecting missing circuit breakers, hardcoded service discovery, and cross-service coupling—rather than generic code smells or security vulnerabilities

Competitors analyzed: SonarQube (general code quality, not microservice-specific), ESLint (generic linting, no architectural awareness), Snyk (security-focused, not distributed systems architecture)

🛠️ Tech Stack

Next.js 14 App Router + TypeScript + TailwindCSS + Lucide-react

Layer	Technology	Purpose
🖥️ Frontend	Next.js 14 App Router	React framework
🎨 Styling	TailwindCSS	Utility-first CSS
🔗 Backend	Next.js API Routes	Serverless endpoints
💾 Data	Server-side logic	Business processing
🚀 Deploy	Vercel	Edge deployment

🚀 Getting Started

Web App / SaaS

# Clone & install
git clone https://github.com/guyromb/nodeguard.git
cd nodeguard
npm install

# Start development
npm run dev
# → http://localhost:3000

# Build for production
npm run build
npm start

Environment Variables (create `.env.local`)

# Add your keys here
NEXT_PUBLIC_APP_NAME=NodeGuard

📊 Market Opportunity

Signal	Data
🔴 Problem Severity	High
📈 Market Demand	8/10
🏆 Competition Gap	8/10 — Blue ocean 🌊
💰 Monetization	7/10
🎯 Model	💳 Paid Subscription
📣 Source	reddit community signal

🤝 Contributing

Contributions are welcome! Here's how:

Fork the repo
Create your branch: git checkout -b feature/amazing-feature
Commit: git commit -m 'Add amazing feature'
Push: git push origin feature/amazing-feature
Open a Pull Request

📄 License

MIT License — see LICENSE for details.

Discovered from reddit · Built 2026-03-03 · Powered by MVP Factory v11

Autonomously researched, validated & generated — zero human code written

Name		Name	Last commit message	Last commit date
Latest commit History 1 Commit
.github/workflows		.github/workflows
src		src
.env.example		.env.example
.gitignore		.gitignore
README.md		README.md
next-env.d.ts		next-env.d.ts
next.config.js		next.config.js
package-lock.json		package-lock.json
package.json		package.json
postcss.config.js		postcss.config.js
tailwind.config.ts		tailwind.config.ts
tsconfig.json		tsconfig.json
vercel.json		vercel.json

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NodeGuard

SaaS platform that automatically scans Node.js microservice repositories to detect distributed systems anti-patterns (hardcoded URLs, missing circuit breakers, tight coupling) and generates actionable refactoring suggestions

⚠️ What's Built vs What's Left

What's real and working right now:

What's stubbed and why:

Step 1 — Add a real database (15 min setup)

Step 2 — Enable real AI responses

Step 3 — Replace demo auth with real sessions (NextAuth.js)

Step 4 — Add email (Resend — free 3000 emails/mo)

Step 5 — Add payments (Stripe)

🎯 The Problem

✨ Features

🔥 Feature 1

⚡ Feature 2

🎨 Feature 3

🔐 Feature 4

📊 Feature 5

🔧 Implementation Guide

🔥 1. AST-based static analysis engine that parses JS/TS files to detect hardcoded HTTP URLs and service endpoints outside of config files

⚡ 2. Circuit breaker pattern detection analyzing package.json for resilience libraries

🎨 3. Health check validation scanning Express/Fastify/NestJS route definitions to ensure proper /health and /ready endpoints exist with correct response formats

🔐 4. Cross-service coupling analyzer building dependency graphs from import statements to identify tight coupling between domains

📊 5. GitHub/GitLab PR integration that automatically comments with specific file-level refactoring suggestions and severity scores

🏗️ How It Works

🎯 Who Is This For?

🧪 Validation Results

🛠️ Tech Stack

🚀 Getting Started

Web App / SaaS

Environment Variables (create `.env.local`)

📊 Market Opportunity

🤝 Contributing

📄 License

About

Releases

Packages

Contributors

Languages

Folders and files

Latest commit

History

Repository files navigation

NodeGuard

SaaS platform that automatically scans Node.js microservice repositories to detect distributed systems anti-patterns (hardcoded URLs, missing circuit breakers, tight coupling) and generates actionable refactoring suggestions

⚠️ What's Built vs What's Left

What's real and working right now:

What's stubbed and why:

Step 1 — Add a real database (15 min setup)

Step 2 — Enable real AI responses

Step 3 — Replace demo auth with real sessions (NextAuth.js)

Step 4 — Add email (Resend — free 3000 emails/mo)

Step 5 — Add payments (Stripe)

🎯 The Problem

✨ Features

🔥 Feature 1

⚡ Feature 2

🎨 Feature 3

🔐 Feature 4

📊 Feature 5

🔧 Implementation Guide

🔥 1. AST-based static analysis engine that parses JS/TS files to detect hardcoded HTTP URLs and service endpoints outside of config files

⚡ 2. Circuit breaker pattern detection analyzing package.json for resilience libraries

🎨 3. Health check validation scanning Express/Fastify/NestJS route definitions to ensure proper /health and /ready endpoints exist with correct response formats

🔐 4. Cross-service coupling analyzer building dependency graphs from import statements to identify tight coupling between domains

📊 5. GitHub/GitLab PR integration that automatically comments with specific file-level refactoring suggestions and severity scores

🏗️ How It Works

🎯 Who Is This For?

🧪 Validation Results

🛠️ Tech Stack

🚀 Getting Started

Web App / SaaS

Environment Variables (create .env.local)

📊 Market Opportunity

🤝 Contributing

📄 License

About

Resources

Stars

Watchers

Forks

Releases

Packages

Contributors

Languages

Environment Variables (create `.env.local`)