Polymarket Launches PolymarketUSD: A New Stablecoin to Power Its Prediction Market Exchange
TLDR:
- Polymarket is replacing USDC.e with PolymarketUSD, a new collateral token backed 1:1 by USDC.
- Power users must manually wrap USDC into PolymarketUSD via the Collateral Onramp contract’s wrap() function.
- CTF Exchange V2 optimizes order matching, fee collection, and introduces support for EIP-1271 signatures.
- Builders must update to the latest CLOB-Client SDK in TypeScript, Python, or Go and re-sign all orders.
Polymarket, the largest prediction market platform, is set to launch its own collateral token, PolymarketUSD. The new token will replace USDC.e as the platform’s primary trading currency.
Backed 1:1 by USDC, the transition aims to optimize the exchange’s infrastructure. This move forms part of a broader platform upgrade affecting contracts, order books, and the collateral system. Most users will experience the change without manual intervention.
Polymarket Introduces a New Collateral Token for Traders
Polymarket USD will serve as the new collateral token across the platform’s trading environment. The token maintains a direct 1:1 backing with USDC, preserving value stability for all participants.
For most users, the frontend will handle the wrapping process automatically through a one-time approval prompt.
However, power users and API-only traders face a different requirement during this migration. They must wrap their USDC or USDC.e manually into PolymarketUSD. This is done through the Collateral Onramp contract’s wrap() function, which handles the conversion directly onchain.
The migration timeline spans two to three weeks, covering the full exchange stack. Polymarket has confirmed it will announce the exact maintenance window at least one week before the upgrade goes live. During that window, all existing order books will be cleared entirely.
This collateral change connects directly to the broader CTF Exchange V2 upgrade. The new exchange contract introduces optimized order structures, better matching logic, and support for EIP-1271 signatures. Fee collection and distribution have also been streamlined under the updated architecture.
CTF Exchange V2 and CLOB-Client SDK Require Builder Action
Beyond the token migration, Polymarket is rolling out a new CLOB-Client SDK to support the V2 infrastructure. TypeScript, Python, and Go clients will all receive updated versions ahead of release day. Builders running bots or integrations must update their SDK and re-sign orders using the new order struct.
The new SDK handles the V1-to-V2 transition automatically, but only for builders running the latest client version. Each client queries a version endpoint and refreshes on migration day without manual input. Documentation and migration guides will be shared before the release date.
CTF Exchange V2 also introduces builder codes, which allow onchain attribution for order flow. This addition gives builders a structured way to track activity tied to their integrations directly onchain. It marks a notable step toward greater transparency for programmatic market participants.
The full API changelog and SDK upgrade documentation, complete with code examples, are scheduled for release shortly. Polymarket has stated that migration guides will cover all three client languages in detail. Traders and developers are advised to monitor official channels for the confirmed upgrade date.
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