Polymarket Paper Trader
Simulate prediction market trading using live order books, authentic fee models, and realistic fill execution for AI agents and algorithmic strategies.
Polymarket Paper Trader provides a zero-risk gym for AI agents and quantitative traders looking to interact with live prediction markets. By connecting directly to Polymarket and Kalshi order books, it faithfully replicates market mechanics—including slippage, partial fills, tick sizes, and official match fee curves—without risking real capital. The tool includes a native Model Context Protocol (MCP) server, allowing autonomous agents in platforms like Claude Code, Cursor, and OpenClaw to practice decision-making, manage virtual cash balances, run automated trading strategies, and benchmark forecasting performance against real-world outcomes.