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PATCH
Update List
Update a subscriber list’s name, description, or privacy flag. Only the fields you provide are changed.

Request

string
required
Subscriber list ID.
string
New list name.
string
New internal list description. It is never shown in hosted or embedded subscriber preferences. Pass null to clear it.
boolean
Private lists stay hidden from subscriber preferences unless you enable member unsubscribe. Public lists can be discovered and joined there. Descriptions always stay internal. Omission defaults to public on creation and preserves visibility on update.
boolean
Allow existing members of a private list to see its name and unsubscribe in email preferences. Defaults to false on creation. On update, omit to preserve the setting or pass false to disable it; null is rejected. The setting is stored but has no effect on public lists. Members cannot join or rejoin private lists through preferences.

Responses

The response includes allowMemberUnsubscribe. Updates that set the same value can be safely retried; creating a list again creates another list, so inspect your lists after an uncertain creation response. A non-boolean or null value for allowMemberUnsubscribe returns HTTP 422 without applying the change. Existing authentication and list-write permissions still apply.