Polymarket CLOB Rate Limits & API Updates (August 2026): What Bot Developers Must Know

In August 2026, Polymarket introduced several operational changes affecting bot developers, including new volume-based CLOB rate limiting and API updates. These modifications impact order placement speed, market-making viability, and overall trading infrastructure. The new volume-based CLOB rate limits, effective around August 6, are a per-signer token bucket system tied to a 30-day trading volume.

Tier levels range from Standard to Elite, with higher tiers unlocking greater order/cancel rates and larger bursts. Developers must monitor response headers, such as Poly-RateLimit-Warning and Retry-After, to avoid temporary throttling.

The CLOB V1 system is fully deprecated, and all production bots must switch to CLOB V2. This update requires the use of pUSD collateral, EIP-712 schemes for signing, and WebSocket channels for consuming order book and user events.

A notable update to the Bridge API includes pagination, effective August 12, 2026. The endpoint /status/{address} now uses cursor-based pagination with a default page size of 50. Additionally, Collateral Return is now available for multi-outcome markets, improving capital efficiency for market makers and multi-leg strategies. Recent SDK and platform enhancements include take-profit/stop-loss support, liquidation line visibility, portfolio history, and dead-man’s switch features.

Engineers should adopt updated libraries, implement idempotent order placement, and handle backpressure cleanly. Market makers will benefit more from the new volume-tiered rate limits and Collateral Return, while directional and copy-trading bots will need to adapt to stricter rate limits and implement batching and volume planning. Overall, these changes push Polymarket toward a more professional trading environment, rewarding real volume and clean rate limit handling.