The server models entities in the Klaviyo API as an easy-to-use SQL database, using tables, views, and stored procedures. These are defined in schema files, which are simple, easy-to-read text files that define the structure and organization of data. Live connectivity to these objects means any changes to your Klaviyo account are immediately reflected when using the server.

The server exposes the following schemas:

• See the Klaviyo 2026-01-15 Data Model for the available entities in the current default API revision.
• See the Klaviyo 2025-04-15 Data Model (Deprecated) for the available entities in the deprecated 2025-04-15 API revision.