API Access
Introduction to Polymarket API for developers.
Polymarket offers a powerful, free API for developers.
Capabilities
- Market Data: Fetch real-time prices, liquidity depth, and resolution data.
- Trading: Place, cancel, and manage orders programmatically.
- History: Download trade history.
CLOB API
Since the shift to the Order Book model, the API is essential for algorithmic traders.
- Endpoint:
https://clob.polymarket.com/ - Documentation: Check the official Polymarket GitHub or Docs for the CLOB API SDK.
Rate Limits
The API is performant but has rate limits to prevent spam. If you are building a high-frequency bot, you may need to optimize your requests.
Related Articles
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Complete guide to using the Polymarket CLOB API for programmatic trading in 2026: authentication, placing orders, accessing market data, Python & TypeScript SDKs, and building trading bots. Includes code examples.
Order Book vs AMM
Does Polymarket use an AMM or order book? Polymarket uses a Central Limit Order Book (CLOB), not an AMM. Learn why Polymarket switched from AMM to order book, how the CLOB works, and what it means for your trades.
Arbitrage
How to find and exploit price discrepancies in prediction markets.