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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 an in-person event.

Only the fields present in the request body change. Sending any address or coordinate field re-geocodes the event, which resets geocode_status and can change latitude and longitude.

Rate limits:
Burst: 10/s
Steady: 150/m

Scopes:
locations:write

OpenAPI Spec