Bot for Kalshi
Arbitrage Bots

meloner3 / poly-kalshi-sports-bot

Repository metadata checked 2026-09-23. GitHub was accessible; latest repository push: 2026-01-18. This does not verify current trading compatibility, security, or returns.

What it does

Cross-platform sports arbitrage between Kalshi and Polymarket. Written in Rust. The highest-starred arbitrage bot in the ecosystem.

What we learned from it

Rust shows up disproportionately in arbitrage code. The latency margins on cross-platform arb are tight enough that the language choice matters — Python's GIL becomes a real constraint when you're racing other bots for a 3¢ spread.

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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.

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