Upgrading

Core API v2 is the current version of the API. v1 stops being served at 00:00 UTC on 4 November 2026. If your integration calls /v1 routes or unprefixed routes such as GET /payments, or uses a Checkout SDK version earlier than 1.12.0, upgrade before then.

• Upgrading from v1 to v2 — what v2 gives you, and the steps to move your integration. Required before 4 November 2026.
• Upgrading webhooks to payload version 2 — webhook bodies that show each resource at the moment of the event. Optional, with no deadline.