What is premarket-arbitrage-bot?

Premarket Arbitrage Bot is an automated tool written in Go that monitors and executes arbitrage trades across prediction markets, platforms where people bet on the outcome of real-world events. Arbitrage here means finding the same question priced differently on two platforms, buying the cheaper side and selling the more expensive one to lock in a profit regardless of the outcome. The bot connects to the Premarket.me API, which aggregates price data from multiple prediction market platforms: Polymarket, Kalshi, Opinion, Probable, Limitless, and Predict.fun. It scans continuously for price discrepancies, filters them by minimum profit percentage, minimum annualized return (APR), and minimum liquidity depth, then shows qualifying opportunities in a real-time color-coded CLI dashboard with profit percentage, APR, and available depth for each. When an opportunity meets your thresholds and execution is enabled, the bot plans an optimal order split using Premarket's liquidity API, checks your USDC balance, and submits the trade to Polymarket's order book. Authentication uses your MetaMask wallet seed phrase to sign in and automatically refresh tokens. By default the bot runs in dry-run mode: it monitors and logs opportunities but does not place any real trades. Execution must be explicitly enabled. Configurable parameters include the polling interval, minimum profit and APR thresholds, minimum liquidity in USD, and maximum trade size in USD. MIT licensed.