Your AI built the app.
FlareLog watches it.
You vibe-coded with Lovable, Cursor, or Claude. It works locally. Then you deployed — and now users hit 500s, you can't see the logs, and your AI can't help because it can't see production. FlareLog fixes that.
The 4 AM vibe coder nightmare
"It works on my machine"
Your Lovable app works in preview. You deploy to production. Users start hitting 500s. You open the Cloudflare dashboard — it shows "Error 1101" with zero logs. You didn't write the code, so you don't even know where to look.
Surprise Cloudflare bill
Your app went viral on Twitter. Great! Then your Cloudflare bill jumps from $5 to $500 because KV writes spiked 100×. Cloudflare's dashboard has a 15-minute lag — by the time you notice, the money's gone.
Your AI can't see production
You paste the error into Cursor or Claude. But the AI only sees what you pasted — not your logs, not your traces, not the request that caused it. It guesses. You deploy the guess. It breaks again.
"Observability" sounds scary
Sentry, Datadog, New Relic — they're built for SRE teams with Kubernetes clusters. You just want to know why your app crashed. The docs assume you know what a "trace" or "span" is. You don't. You just want it to work.
FlareLog is built for this
Catches crashes your AI can't
The Tail Worker runs out-of-band — it sees crashes that happen before your code runs. Error 1101? Captured. CPU timeout? Captured. Memory limit? Captured. Your AI will know exactly what broke.
How it works →AI debugs production for you
Connect FlareLog's MCP server to Cursor or Claude Desktop. Your AI can now read your production logs, search errors, and suggest fixes — without you copy-pasting anything.
Set up MCP →Stops surprise bills
Cost burn alerts ping you on Slack/Discord before Cloudflare's 15-minute lag catches up. Set a threshold, get notified, fix the runaway KV writes before the invoice lands.
Stop the bleed →3 steps. 5 minutes. No DevOps.
Install the SDK
One npm install. One line in your start.ts or fetch handler. The SDK auto-detects your runtime — no config needed.
Deploy the Tail Worker
Clone a template, set your API key, deploy. The Tail Worker catches crashes your SDK can't — even if your app dies on line 1.
Connect your AI
Add the MCP server URL to Cursor or Claude. Now your AI can read your logs and debug production without you pasting anything.
Built for how you build
Questions vibe coders ask
What is vibe coding?
Vibe coding is building apps with AI tools like Lovable, Cursor, Claude, v0, and Bolt. You describe what you want in plain English, the AI generates the code, and you ship it. It's fast and fun — until your app crashes in production and you can't debug it because you didn't write the code yourself.
Do I need to know how to code to use FlareLog?
No. If you can copy-paste an API key and click 'deploy', you can use FlareLog. The SDK is one line of code, the Tail Worker is a template you clone and deploy, and the MCP server connects to Cursor/Claude so your AI can read your production logs and debug for you.
I built my app with Lovable. Will FlareLog work?
Yes. Lovable generates TanStack Start apps deployed to Cloudflare Workers. FlareLog has a dedicated Lovable integration — add one line to your start.ts file and you're logging. See the Lovable guide for step-by-step setup.
What's an MCP server and why do I care?
MCP (Model Context Protocol) is a standard that lets AI tools like Cursor and Claude Desktop read external data. FlareLog's MCP server lets your AI see your production logs, traces, and errors — so instead of copy-pasting error messages into ChatGPT, your AI can query your dashboard directly and suggest fixes.
My app crashed but I don't see any error. Why?
If you're on Cloudflare Workers, the most common reason is Error 1101 — your Worker threw an exception that your logging SDK never caught (because the Worker died before the SDK could fire). FlareLog's Tail Worker runs out-of-band and captures these crashes. See /errors/1101 for the full explanation.
Will this work if I used v0, Bolt, or Replit instead of Lovable?
Yes. FlareLog works with any app that runs on Cloudflare Workers, Vercel, or Node.js — regardless of which AI tool generated the code. The SDK is framework-agnostic. If your app runs JavaScript, FlareLog can log it.
Stop guessing. Start knowing.
Free 10k logs/mo. 90-day retention. Tail Worker crash capture. MCP server for Cursor/Claude. Cost burn alerts. No credit card. No DevOps. No Kubernetes. Just answers.
Start logging free →