Polymarket

Polymarket is a prediction market protocol running on Polygon. It operates a Central Limit Order Book (CLOB) where users trade binary outcome tokens priced between $0 and $1. Each market has Yes and No tokens backed by USDC through the Conditional Token Framework (CTF). The CLOB uses off-chain matching with on-chain settlement via Polygon. Authentication is two-layered: L1 (EIP-712 wallet signing) to derive API credentials, L2 (HMAC-SHA256) to authenticate trading requests.

Base URLs:

• CLOB API: https://clob.polymarket.com
• Gamma API (market data): https://gamma-api.polymarket.com
• Data API (trades/positions): https://data-api.polymarket.com
• WebSocket (Market): wss://ws-subscriptions-clob.polymarket.com/ws/market
• WebSocket (User): wss://ws-subscriptions-clob.polymarket.com/ws/user
• Relayer (gasless): https://relayer-v2.polymarket.com/

What You Probably Got Wrong

LLMs have stale training data. These are the most common mistakes.