Preview plan change (shows overage counts)

get/api/billing/change-plan/preview

Query parameters

planstring required

Target plan (JSON)

Plan change preview

errorstring nullable

Human-readable failure message. Omitted on success.

successboolean required

true when the request succeeded. false responses carry error instead of data.

{
  "meta": {
    "api_version": 1,
    "server_version": "0.17.13"
  }
}