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This endpoint is in beta and subject to change.

A beta revision header (2026-10-15.pre) is required to use our beta APIs. Klaviyo APIs in beta are not intended for use in production. See our versioning and deprecation policy for more information.

Update a Google or web-safe font in the brand font library.

Uploaded and Adobe fonts cannot be updated through this API.

Rate limits:
Burst: 3/s
Steady: 60/m

Scopes:
brands:write

OpenAPI Spec