How I built a real-time whale tracker for Polymarket using Node.js and a CLI

The 2026 World Cup has $3.89 billion bet on it across Polymarket. That’s not retail money — that’s whales.

I built WhaleTrack to track exactly what those big wallets are doing. Here’s the stack:

Backend: Node.js server fetching live data via Bullpen CLI
Frontend: Vanilla JS, real-time updates
Data: Polymarket CLOB API via Bullpen
Analytics: Google Analytics for traffic tracking
The hardest part wasn’t the code — it was getting users. Pure SEO and content distribution (Reddit, Twitter, IH).

The site is live at whaletrack.app — would love feedback from devs on the UX and performance.

Happy to open source parts of it if there’s interest.