Circle Drops Legacy CCTP V1 as October 31 Deadline Looms

Circle has announced that it will be deprecating its CCTP V1 (Legacy) on October 31, 2026. This move affects applications still using legacy contracts and requires them to migrate immediately.

The deprecation period is set to end on December 1, 2026. However, the dYdX Chain will remain unaffected by this change, with Noble USDC continuing to be supported.

Developers are advised to review the reasons behind the CCTP V1 deprecation and the timeline for migration, as well as the technical differences between CCTP V2 and V1. This information is crucial for accessing Standard and Fast Transfer modes, hooks, and new chain support.