Circle will discontinue CCTP V1 on December 1, 2026, urging developers to migrate to V2
Circle announced that CCTP V1 (Legacy) will be gradually phased out from October 31, 2026 and will be discontinued on December 1. If the application still routes USDC through the CCTP V1 contract, migration must be initiated immediately. CCTP V2 supports standard and fast transfer modes, hooks programmable features, and subsequent public chain integration. Circle has released migration guidelines, reminding developers to complete contract and routing updates to avoid cross chain USDC circulation obstruction.