Update Campaign Messagepatch https://a.klaviyo.com/api/campaign-messages/{id}Update a campaign message.Rate limits:Burst: 10/sSteady: 150/m Scopes: campaigns:write OpenAPI SpecPath ParamsidstringrequiredThe ID of the messageQuery Paramsfields[campaign-message]array of stringsFor more information please visit https://developers.klaviyo.com/en/v2026-10-15/reference/api-overview#sparse-fieldsetsfields[campaign-message]Show 22 enum valuesADD stringBody Paramsdataobjectrequireddata objectHeadersrevisionstringrequiredDefaults to 2026-10-15API endpoint revision (format: YYYY-MM-DD[.suffix])Responses 200Success 4XXClient Error 5XXServer ErrorUpdated 1 day ago Did this page help you?YesNo
