Longbridges

Longbridges / polymarket-kalshi-arbitrage-bot

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github.comLongbridgespolymarket-kalshi-arbitrage-bot arbitrage arbitrage-bot automated-trading clob cross-venue-arbitrage
122
48
69% credibility
Found May 11, 2026 at 122 stars -- GitGems finds repos before they trend. Get early access to the next one.
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AI Analysis
TypeScript
AI Summary

This is a monitoring tool that compares prices between Polymarket and Kalshi prediction markets to identify arbitrage opportunities and can automatically execute buy orders on Polymarket.

How It Works

1
🔍 Discover the trading helper

You find this handy bot online that watches betting prices on two popular prediction sites to spot money-making price differences.

2
📊 Pick matching events

You choose short-term events like 'Will this happen in 15 minutes?' that appear on both betting sites.

3
⚙️ Set your deal rules

You decide the price gaps needed, like buying cheap on one site when the other prices it higher, and how much to bet each time.

4
🔗 Link your betting account

You safely connect your betting money account so the bot can make buys for you when deals appear.

5
▶️ Start the price watcher

With one click, you launch the bot to continuously check prices every few seconds.

6
💡 Spot profitable gaps

The bot lights up with alerts when prices differ enough, showing exactly why it's a good buy.

7
✅ Watch trades happen

If you chose auto-trading, the bot places buys automatically while you monitor the live status.

💰 Collect your gains

After the events end, you review the smart trades and enjoy profits from the price differences.

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Star Growth

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AI-Generated Review

What is polymarket-kalshi-arbitrage-bot?

This TypeScript bot monitors paired short-duration prediction markets on Polymarket and Kalshi, pulling real-time prices via Polymarket's CLOB and Kalshi's trade API to spot arbitrage gaps—like when Kalshi YES prices hit 93-96 cents but Polymarket UP is 10+ cents cheaper. It emits buy signals for spread plays or late resolutions when Kalshi settles first, and optionally places automated Polymarket buy orders using the clob-client. Runs as an Express server with /status for live data, /health checks, and poll controls, configurable via .env for markets, thresholds, and trade sizes.

Why is it gaining traction?

Its narrow focus on 15-minute events delivers clear, configurable rules with cooldowns and start delays, plus a demo video showing real BTC trades—perfect for polymarket trading bot github fans. The HTTP API lets you validate signals without risking capital, and Reddit threads praise the polymarket kalshi arbitrage bot reddit setup for quick deploys on VPS. Beats generic bots by handling venue differences like Polymarket token IDs and Kalshi tickers out of the box.

Who should use this?

Prediction market traders hunting cross-platform arb on BTC up/down or election binaries between Kalshi and Polymarket. Node devs building polymarket trading strategies with automated execution via private keys and proxy wallets. Suited for low-volume, event-driven plays—not HFT or complex portfolios.

Verdict

Grab it for polymarket github bot signal monitoring on 15-min markets; docs and API are polished for fast iteration. At 122 stars and 0.7% credibility score, it's early-stage—dry-run signals first, trade small, as markets carry real risks.

(198 words)

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