Price Tracker
2026Next.js · TypeScript · Firebase
A price-monitoring tool that tracks products across Amazon, Mercado Livre, Magazine Luiza, and KaBuM!, scraping prices daily and sending a Telegram alert whenever one drops below a target.
Layers touched
Front-endBack-endDataInfra
Stack
Notes
- Scrapes with Cheerio and rotates user-agents to avoid store blocks.
- Scheduled with Vercel Cron; price history stored in Firebase Firestore.
- Dashboard compares stores and charts price history, including historical-low detection.
- Anti-spam guard: won't re-alert for the same price within 24 hours.