FaultFixer: Self-Healing for Websites and Apps
FaultFixer is a tool that adds self-healing capabilities to websites and apps with a single line of code. It uses AI to detect front-end and back-end errors, diagnose root causes, and deliver fixes directly to your AI coding tools via MCP. Currently free, with paid plans possibly introduced later after notice.
The immune system for your app
For websites & apps to self-heal themselves.
Paste one line of code. FaultFixer detects every front-end and back-end error, diagnoses the root cause with AI, and hands it straight to your AI coding tool.
Start free See how it works
One snippet · one-minute setup
index.html
Works great with AI coding
MCP for all your AI tools.
Connect once. Your agent reads live issues — root cause, fix suggestion, and impact — and ships the change.
claude code — ~/mywebsite · faultfixer mcp
list the issues
faultfixer▸list_unresolved_issues
FaultFixer · 3 unresolved issues
CRITTypeError: undefined is not a functioncheckout.js:142 · 2.3k users
HIGHUnhandled promise rejectionapi/cart.ts:88 · 540 users
MEDHydration mismatchHeader.tsx:31 · 120 users
Want me to fix all three? (yes / no)
yes, fix them
✓ Pinpointing root cause
✓ Patching checkout.js
✓ Patching api/cart.ts
✓ Patching Header.tsx
All three patched. Want me to deploy to production?
yes, deploy
✓ Deploying to production · MyWebsite.com
faultfixer▸mark_resolved
✓ Marking issues resolved in FaultFixer
✓ 3 issues marked resolved
Fixed, deployed, and resolved — MyWebsite.com is now healed.
Reply to claude code…
Works everywhere
Integrates with all platforms.
Drop it into anything you've already built. No rewrites, no lock-in.
JS JavaScript
React ▲ Next.js
Vue S Svelte node Node.js Py Python Rb Ruby php PHP Go Go .NET .NET java Java ▲ Vercel Edge CF Cloudflare Workers λ AWS Lambda Bun Bun Dno Deno Nx Nuxt SK SvelteKit A Astro Static HTML
No-code & vibe-coded sites
Wherever your team works
Get notified everywhere.
Auto-file diagnosed, fix-ready issues straight into your issue tracker — GitHub, GitLab or Bitbucket — route them to the channels your team already watches, or pull them into your AI tools over MCP.
MCP
GitHub
GitLab
Bitbucket
Slack
Discord
Teams
Telegram
Webhook
On the house
Everything, free — no plans to pick.
Every account is on our full Pro experience from the moment you sign up. No tiers to compare, no card to enter, no checkbox to tick — just start monitoring.
Totally free for the next several months while we make sure everything is rock-solid. If we ever introduce a paid plan, we’ll give you plenty of notice first — never a surprise charge, never without a friendly heads-up.
AI root-cause diagnosis
Root cause, blast radius and a fix-ready hypothesis — not just a stack trace.
Steps to reproduce
The click, route and request trail before each error, as a clean timeline you can see.
Your code vs. third-party
Every error tagged as your bug, a dependency’s, or an outside script.
Introduced-in-release
Pinned to the deploy that introduced it, with the last-good release to diff against.
Automatic regression detection
A resolved error that returns re-opens itself and pings you — the fix didn’t hold.
Spike & burst alerts
The moment an error surges above its usual rate, you’re notified — before it floods.
Fix-priority ranking
One score fuses severity, impact and confidence so you fix the right thing first.
Smart noise reduction
Duplicates, bots and benign chatter filtered out before they cost you a clean event.
Fix from your editor
Issues and fixes over MCP into Claude Code & Cursor — plus Slack, GitHub, Telegram and more.
Give your app an immune system.
One snippet today. Self-healing tomorrow. Free to start — no credit card, no servers to run.
Start free How it works