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Feb 12, 2026
5-Minute Crypto Markets
  • 5-minute crypto markets: Launched with taker fees enabled. Fees follow the same curve as 15-minute crypto markets, peaking at 1.56% at 50% probability.
  • Maker Rebates: Liquidity providers earn daily USDC rebates funded by taker fees, same as 15-minute crypto markets.
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Feb 11, 2026
Taker Fees & Maker Rebates: NCAAB and Serie A
  • Sports market fees: Taker fees to be enabled on NCAAB (college basketball) and Serie A markets on February 18, 2026.
  • Per-market rebate calculation: Rebates are now calculated per market, makers only compete with other makers in the same market.
  • Updated documentation: Maker Rebates Program updated with sports fee tables and parameters.
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Jan 28, 2026
Bridge API: Withdrawal Endpoint
  • Withdrawal Endpoint: New /withdraw endpoint to bridge USDC.e from Polymarket to any supported chain and token.
  • Multi-chain withdrawals: Withdraw to EVM chains (Ethereum, Arbitrum, Base, etc.), Solana, and Bitcoin.
  • Updated documentation: Bridge API docs updated to reflect deposit and withdrawal functionality.
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Jan 16, 2026
Docs Update: RTDS documentation
  • RTDS docs updated to reflect RTDS supports comments and crypto prices only.
  • Removed legacy CLOB references and clob_auth from RTDS docs.
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Jan 16, 2026
Docs Update: Maker Rebates Program
  • Maker Rebates Program: Updated funding schedule with distribution method (volume-weighted vs fee-curve weighted).
  • Fee-curve weighted rebates: Documented fee-equivalent formula and rebate calculation.
  • FAQ: Clarified how rebates are calculated during fee-curve weighted periods.
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Jan 6, 2026
New API Features
  • Releases: Daily Releases timing
  • HeartBeats API: HeartBeats endpoint for monitoring connection status and canceling orders
  • Post Only Orders: Orders that are rejected if they would immediately match against an existing order
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Jan 5, 2026
Taker Fees & Maker Rebates
  • Taker Fees: Enabled on 15-minute crypto markets. Fees vary by price and peak at 1.56% at 50% probability.
  • Maker Rebates: Daily USDC rebates paid to liquidity providers, funded by taker fees.
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Sept 24, 2025
Polymarket Real-Time Data Socket (RTDS) official release
  • Crypto Price Feeds: Access real-time cryptocurrency prices from two sources (Binance & Chainlink)
  • Comment Streaming: Real-time updates for comment events including new comments, replies, and reactions
  • Dynamic Subscriptions: Add, remove, and modify subscriptions without reconnecting
  • TypeScript Client: Official TypeScript client available at real-time-data-client For complete documentation, see Market Data.
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September 15, 2025
WSS price_change event update
  • There has been a significant change to the structure of the price change message. This update will be applied at 11PM UTC September 15, 2025. We apologize for the short notice
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August 26, 2025
Updated /trades and /activity endpoints
  • Reduced maximum values for query parameters on Data-API /trades and /activity:
    • limit: 500
    • offset: 1,000
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August 21, 2025
Batch Orders Increase
  • The batch orders limit has been increased from 5 -> 15. Read more about the batch orders functionality here.
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July 23, 2025
Get Book(s) update
  • We’re adding new fields to the get-book and get-books CLOB endpoints to include key market metadata that previously required separate queries.
    • min_order_size
      • type: string
      • description: Minimum price increment.
    • neg_risk
      • type: boolean
      • description: Boolean indicating whether the market is neg_risk.
    • tick_size
      • type: string
      • description: Minimum price increment.
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June 3, 2025
New Batch Orders Endpoint
  • We’re excited to roll out a highly requested feature: order batching. With this new endpoint, users can now submit up to five trades in a single request. To help you get started, we’ve included sample code demonstrating how to use it. Please see Create Orders for more details.
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June 3, 2025
Change to /data/trades
  • We’re adding a new side field to the MakerOrder portion of the trade object. This field will indicate whether the maker order is a buy or sell, helping to clarify trade events where the maker side was previously ambiguous. For more details, refer to the MakerOrder object on the Orders page.
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May 28, 2025
Websocket Changes
  • The 100 token subscription limit has been removed for the Markets channel. You can now subscribe to as many token IDs as needed for your use case.
  • New Subscribe Field initial_dump
    • Optional field to indicate whether you want to receive the initial order book state when subscribing to a token or list of tokens.
    • default: true
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May 28, 2025
New FAK Order Type
We’re excited to introduce a new order type soon to be available to all users: Fill and Kill (FAK). FAK orders behave similarly to the well-known Fill or Kill (FOK) orders, but with a key difference:
  • FAK will fill as many shares as possible immediately at your specified price, and any remaining unfilled portion will be canceled.
  • Unlike FOK, which requires the entire order to fill instantly or be canceled, FAK is more flexible and aims to capture partial fills if possible.
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May 15, 2025
Increased API Rate Limits
All API users will enjoy increased rate limits for the CLOB endpoints.
  • CLOB - /books (website) (300req - 10s / Throttle requests over the maximum configured rate)
  • CLOB - /books (50 req - 10s / Throttle requests over the maximum configured rate)
  • CLOB - /price (100req - 10s / Throttle requests over the maximum configured rate)
  • CLOB markets/0x (50req / 10s - Throttle requests over the maximum configured rate)
  • CLOB POST /order - 500 every 10s (50/s) - (BURST) - Throttle requests over the maximum configured rate
  • CLOB POST /order - 3000 every 10 minutes (5/s) - Throttle requests over the maximum configured rate
  • CLOB DELETE /order - 500 every 10s (50/s) - (BURST) - Throttle requests over the maximum configured rate
  • DELETE /order - 3000 every 10 minutes (5/s) - Throttle requests over the maximum configured rate