Polymarket has announced its Protocol V2 launch, with a full mainnet switchover for newly created markets tentatively scheduled for November 2, 2026. The upgrade replaces the platform’s 2019-era Gnosis Conditional Tokens Framework (CTF) foundation and introduces a single ERC-1155 position system, pUSD collateral, modular resolution, and cross-chain infrastructure.
Polymarket protocol head Rajath Alex said on October 5 that canary markets will run in production from October 5 through October 30. After that, net-new markets will “tentatively” begin moving to Protocol V2 on November 2. Existing CTF markets and positions will not automatically migrate to the new contracts.
The new protocol consolidates multiple market types into separate modules, including binary markets, atomic negative-risk markets, incremental negative-risk markets, and combinatorial markets. Position IDs now encode module, condition, and outcome directly into token identifiers. The system uses a common PositionManager contract and Router, while the OracleAggregator sits above pluggable reporter, dispute, and arbitration modules.
Polymarket’s new resolution layer supports multiple data sources. Current reporter contracts include an UMA Optimistic Oracle module, a Chainlink reporter using Chainlink Data Streams, and an EOA reporter. This means UMA can pass settled event-based outcomes into the aggregator, while Chainlink can handle price-based resolution for objective markets. The contracts also include cross-chain infrastructure through Chainlink CCIP, with Polygon remaining the resolution hub. No date has been announced for multi-chain activation.
Protocol V2 makes pUSD the common collateral asset across new market modules. pUSD is an ERC-20 token wrapping USDC and USDC.e at a 1:1 ratio through an external vault. Existing integrations already using pUSD do not need to replace their collateral setup when adding V2 support, according to Polymarket’s migration guide. However, developers need new permissions because existing CTF approvals do not carry over.
Security preparations include reviews by Cantina, Certora, Quantstamp, Pashov, Sigma Prime and Zellic across major V2 components. Certora formal verification covers the Exchange, Collateral Token, Position Manager, Binary Module, NegRisk Module, Combinatorial Module and OracleAggregator. Polymarket says critical vulnerabilities remain eligible for rewards of up to $5 million under its bug bounty program.
Separately, Data API V1 will retire on October 24, 2026, requiring integrations to move to Data API V2 before that date. The new API uses cursor-based pagination and snake_case fields, and removes the old 10,000-row offset limit. For regular app and website users, no technical migration is required, although they may see new approval prompts when interacting with V2 markets.
Polymarket has been experiencing cautious trading activity, with some reporting low 24-hour volume as traders await the new protocol’s launch. The modular design, cross-chain bridging, and enhanced oracle infrastructure could improve liquidity and user experience once fully operational.
