Bot for Kalshi
Arbitrage Bots

ImMike / polymarket-arbitrage

by Mike (ImMike)

Repository metadata checked 2026-09-23. GitHub was accessible; latest repository push: 2025-12-09. This does not verify current trading compatibility, security, or returns.

What it does

Watches 10,000+ markets across Polymarket and Kalshi for arbitrage opportunities. Includes a FastAPI web UI with real-time opportunities, a built-in backtesting engine, dual data mode (simulation vs real), and a kill switch.

What we learned from it

the dual data mode pattern (sim/real toggle behind one interface) is the right way to ship a bot. You can validate the same code path in simulation before flipping the switch — fewer "well it worked in dev" failures.

Get the free weekly Kalshi flow report

One email every Monday with the past week's Kalshi activity: the largest fills, where size kept accumulating, the biggest movers, and the most traded markets. Numbers and tickers — no picks, no predictions.

You're on the list. The next report goes out Monday.

Don't want to maintain your own bot?

Bot for Kalshi is the no-code platform for automated prediction-market trading — visual builder, signals, encrypted credentials, kill switch. The infrastructure these open-source projects build, ready to use.

Start building →

One plan includes the visual builder, paper and live modes, hosted execution, and risk controls. Cancel anytime.