Noteligence — AI Second Brain - Sell Project

NOTELIGENCE — AI note-taking app, complete source + setup guide Notes app with an AI layer built in: chat about your notes, ask questions about attached images and files, and a working free/paid subscription split — all in a single, clean HTML/JS frontend backed by a Cloudflare Worker. WHAT IT DOES Rich note-taking with markdown, search, pinning, attachments AI chat that reads your notes and attached files for context Image understanding (ask questions about photos/screenshots you've attached) Free tier + $2.99/mo paid tier, enforced server-side (not just hidden buttons — the backend is the actual source of truth) Full account lifecycle: signup, Google sign-in, password reset, account deletion that actually cleans up every data store STACK Frontend: single HTML file, vanilla JS, no build step Auth + database: Firebase (Realtime DB, Auth) File storage: Supabase Storage Backend: Cloudflare Worker (proxies AI + payment calls, holds all secret keys server-side — the browser never sees an API key) AI: Groq Payments: Stripe, full PaymentIntent + webhook flow WHY THE BACKEND IS WORTH SOMETHING ON ITS OWN This isn't a UI wrapped around a raw API key. The Worker: Independently re-verifies every payment with Stripe before granting a subscription — never trusts what the browser reports Is idempotent — a double-click or a dropped connection can't grant two subscriptions for one payment Enforces daily usage limits authoritatively server-side, closing the "just edit a variable in devtools" bypass that a lot of small SaaS apps are vulnerable to Has a documented history of real fixes — this shipped, got used, and got iterated on, it wasn't written once and abandoned WHAT'S INCLUDED Full source: the app file + the Cloudflare Worker file Firebase security rules (ready to paste in) A written architecture note explaining the design decisions A complete step-by-step setup guide — no prior Firebase/ Supabase/Cloudflare experience assumed, every account creation and config step spelled out App icon / logo source files (branding included) WHAT YOU'RE BUYING This is source code and a working blueprint, not a running business — there's no existing user base or revenue attached to this listing. Every piece runs on generous free tiers to start (Cloudflare Workers, Firebase, Supabase all have free tiers sized for genuine early usage), so your only real cost at low volume is AI usage through Groq, which is inexpensive per-token by design. Once sold, I shut down my own deployment and don't resell this codebase to anyone else — it's a one-buyer sale. WHY I'M SELLING Moving fast on a new, more ambitious project and want to put my full attention there rather than let this sit unlaunched. It's in good enough shape that someone else finishing the job made more sense than me shelving it. Happy to answer technical questions before you buy.