Polymarket says it will complete a full exchange stack upgrade within the next two to three weeks, calling it the largest infrastructure overhaul since launch. The migration will replace three core components at once: the trading contract, the order book, and the collateral token. During the upgrade window, the platform will enter brief maintenance and the existing order books will be cleared.
CTF Exchange V2 changes order structure and expands wallet support
A central part of the rollout is the new CTF Exchange V2 contract. CTF, short for Conditional Token Framework, is the trading engine underneath Polymarket. According to the announcement, V2 simplifies and optimizes the order structure, improves matching efficiency, and introduces more flexibility in how fees are charged and distributed.
The new version also adds support for the EIP-1271 signature standard. That opens the door for smart contract wallets to place orders directly on Polymarket, including multisig wallets such as Gnosis Safe. Before this change, those users faced compatibility limits tied to the signature model.
V2 also includes a built-in “builder code” mechanism that tracks where orders originate on-chain, giving integrators a way to identify traffic attribution.
Polymarket USD will replace bridged USDC.e as collateral
On the collateral side, Polymarket will move away from USDC.e and migrate to a new token called Polymarket USD. The company says the token is backed 1:1 by USDC, with Circle named as the partner behind the stablecoin arrangement first announced in February 2026.
For regular users, the front end will handle the wrapping process automatically after a one-time approval. API traders and bot operators have more work to do. They will need to call the wrap() function on the Collateral Onramp contract to convert USDC or USDC.e into Polymarket USD before placing orders.
Polymarket framed the change as a risk reduction step. USDC.e is a bridged asset, which means bridge-related risk remains part of the setup. Moving to Polymarket USD, backed by native USDC, is intended to reduce exposure to possible smart contract vulnerabilities and align more closely with compliance needs.
New CLOB SDK will auto-switch versions, but upgrades are required
Another major piece of the release is a new CLOB Client SDK. Polymarket says the SDK will handle the switch from V1 to V2 automatically, with clients checking a version endpoint and refreshing on migration day. That should cut down on manual intervention for developers.
There is a condition attached to that automation. Developers have to update to the latest SDK first. Polymarket said TypeScript, Python, and Go versions will be ready before launch, with documentation released at the same time. Teams running bots or integrated services will also need to re-sign orders under the new order structure.
The company said it will publish the exact migration time at least one week in advance and provide a migration guide, API changelog, and code samples across supported languages. Partners that need extra help can apply for one-on-one integration support before the release goes live.
Technical overhaul comes after fresh funding and U.S. regulatory progress
The upgrade follows a series of recent moves by Polymarket. According to the source material, Intercontinental Exchange announced an additional $600 million investment in April 2026, after an earlier $1 billion injection in October 2025. Over the same period, Polymarket also received CFTC approval to return to the U.S. market as a designated contract market.
The timing puts the platform’s technical rebuild alongside its compliance push. For developers, API traders, multisig wallet users, and automation teams, the coming weeks are the main window to prepare for the contract transition, SDK update, and collateral migration.