Update Flow Actionpatch https://a.klaviyo.com/api/flow-actions/{id}Update a flow action.Rate limits:Burst: 3/sSteady: 60/m Scopes: flows:write OpenAPI SpecPath ParamsidstringrequiredQuery Paramsfields[flow-action]array of stringsFor more information please visit https://developers.klaviyo.com/en/v2026-04-15/reference/api-overview#sparse-fieldsetsfields[flow-action]ADD stringBody Paramsdataobjectrequireddata objectHeadersrevisionstringrequiredDefaults to 2026-04-15API endpoint revision (format: YYYY-MM-DD[.suffix])Responses 200Success 4XXClient Error 5XXServer ErrorUpdated 1 day ago