Readonly channelsChannels and consent sub-types to request, or ALL_AVAILABLE_MARKETING to request marketing consent on every identified channel.
Required so a broad consent grant is always an explicit choice.
Optional Readonly customFree-text label describing where this signup originated (e.g. a form or screen name), stored as
the consent record's $source. Omitted from the request when absent.
Readonly listID of the Klaviyo list to subscribe the profile to.
A request to subscribe the current profile to a Klaviyo list, with per-channel consent.
Set the profile's email and/or phone number before subscribing — the native SDKs drop a request whose channel has no matching identifier on the profile, and log a warning.