Skip to main content
The Polymarket US Retail API provides programmatic access for automated trading.

API Overview

The Retail API includes 11 REST endpoints + 2 WebSocket endpoints:
CategoryEndpointsPurpose
Markets4Query market data and settlement
Trading5Place, cancel, query orders
Portfolio2Positions and balances
WebSocket2Real-time streaming (private + markets)

Capabilities

  • Query markets with filtering, pagination, and sorting
  • Generate API keys from the web portal
  • Subscribe to real-time market data (up to 10 instruments) via /v1/ws/markets
  • Subscribe to real-time order, position, and balance updates via /v1/ws/private
  • Place limit and market orders
  • Cancel orders (single or all)
  • Check open orders
  • View positions and balances