Arbitrage Research ToolFind risk-free trades across prediction markets. In your terminal.
Arbitrage Research Tool scans Polymarket, Kalshi, PredictIt, Manifold and Metaculus simultaneously — and surfaces potential arbitrage opportunities in real time.
$ brew install mirekondro/arb-tool/arb-tool
From market noise to guaranteed profit, in three passes.
Scan
Fetches hundreds of open markets from all 5 platforms every 60 seconds.
Match
Fuzzy-matches market titles across platforms using NLP similarity scoring.
Surface
Shows only pairs where YES + NO < $1, sorted by apparent arbitrage opportunity %.
Built for traders who live in the terminal.
13-column live table
Tier, profit %, convergence Δ, liquidity, time to close, first-seen age.
Category filter
⚽ Sports · 🏛 Politics · 🌍 World · 💰 Crypto · 📈 Finance · 🔬 Science.
Bet-sizing calculator
Select a row → instantly see exact dollar amounts for $100 / $1K / $10K stakes.
Watchlist
Press w to bookmark any opportunity. 📌 badge persists across restarts.
Copy trade
Press c to copy a structured trade memo to your clipboard.
Real$ filter
One toggle hides play-money noise — only Polymarket / Kalshi / PredictIt arb.
Five markets, one feed.
One command. Three ways.
$ brew install mirekondro/arb-tool/arb-toolRecommended for macOS / Linux
$ pipx install arb-toolIsolated, app-style install
$ pip install arb-toolAdd to an existing project
↳ Python 3.10+ required
Keyboard-first, mouse-optional.
| r / Ctrl+R | Refresh all platforms |
| ↑ ↓ | Navigate rows |
| o | Open market URLs in browser |
| c | Copy trade to clipboard |
| w | Toggle watchlist |
| n | Search news for this topic |
| x | Export to CSV |
| s | Cycle sort mode |
| ? | Show help |
| q | Quit |
Not financial advice. This tool is for research and educational purposes only. Nothing displayed constitutes investment advice. Apparent arbitrage opportunities may disappear before execution due to slippage, fees, or market movement. All trading decisions are made at your own risk.
Play-money platforms (Manifold, Metaculus) use virtual currencies with no real-world value — those opportunities are research signals only. Polymarket is not available to US residents. Always check each platform's terms of service before trading.