Authenticated API
The authenticated API also provides two WebSocket endpoints for real-time streaming:
Introduction
Overview of the Polymarket US API
The Polymarket US API is split into two parts: an authenticated API for trading and a public API for reading market data. For support, contact support@polymarket.us.
Use the authenticated API to trade. This is where you place orders, check your positions, and manage your account. Every request requires an API key - see Authentication to get set up.
Use the public API to browse what’s available on Polymarket US. No API key needed. This is where you fetch markets, events, series, sports data, and search results. If you’re building something that displays market information - prices, odds, order books - this is all you need.