API error code

RUP-STP-402-PLAN_CUSTOM_DOMAIN

Custom domains are not included in your plan. Upgrade to use one.

HTTP status: 402
Area: Status pages

Description

English: Custom domains are not included in your plan. Upgrade to use one.
Turkish: Özel alan adı paketinizde yok. Kullanmak için paketinizi yükseltin.

Example response

HTTP 402 · application/problem+json

{
  "type": "https://rintup.com/docs/errors/RUP-STP-402-PLAN_CUSTOM_DOMAIN",
  "title": "Custom domains are not included in your plan. Upgrade to use one.",
  "status": 402,
  "code": "RUP-STP-402-PLAN_CUSTOM_DOMAIN",
  "traceId": "…"
}

How to handle it

This is a client error: the request will fail the same way if it is sent again unchanged. Fix the request, the key or the account state first.

Branch on the code field, not on the title: code never changes, while title follows the Accept-Language header (Turkish or English). Include traceId when you contact support.