Rust Polymarket–Kalshi arbitrage engine
Low-latency cross-platform arbitrage written in Rust.
Paper-only Python scanner that watches live Polymarket order books for moments when the YES and NO asks plus fees add up to less than $1, checks that the depth is real, and simulates the fills. Has one engine for BTC 5-minute windows and one for the wider active market set, with Streamlit and FastAPI dashboards. Any edge it reports is simulated, not verified.
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Paper-only Python scanner that watches live Polymarket order books for moments when the YES and NO asks plus fees add up to less than $1, checks that the depth is real, and simulates the fills. Has one engine for BTC 5-minute windows and one for the wider active market set, with Streamlit and FastAPI dashboards. Any edge it reports is simulated, not verified. See the source for setup, usage and current status.
Tools: PythonWebSocket order booksLightGBM+2
Difficulty: advanced
Platforms: Polymarket
Paper-only Python scanner that watches live Polymarket order books for moments when the YES and NO asks plus fees add up to less than $1, checks that the depth is real, and simulates the fills. Has one engine for BTC 5-minute windows and one for the wider active market set, with Streamlit and FastAPI dashboards. Any edge it reports is simulated, not verified. It is listed under Arbitrage in this directory.
According to its source, it works with Polymarket.
The source lists: Python, WebSocket order books, LightGBM, Streamlit, FastAPI.
It was published by RyFinance. The public source is at github.com/RyFinance/arbiter.
This directory rates it advanced (beginner, intermediate or advanced).
It had 1 GitHub star as of Oct 20, 2026.
The repository was last updated on Oct 20, 2026, as checked on Oct 23, 2026. Check the source for current status.
Compare all arbitrage tools → · How to build a Polymarket bot
Low-latency cross-platform arbitrage written in Rust.
Watches 10,000+ Polymarket and Kalshi markets for mispriced pairs.
Manual cross-venue arbitrage scanner that pulls public Kalshi and Polymarket market data, matches equivalent yes/no contracts with confidence scores and close-time checks, and ranks spreads on a review dashboard where quotes can be refreshed before a manual decision. Live order submission is disabled in this build.
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