domain_reserved_suffix

The hostname is under a Spacefast-managed suffix and cannot be added as a domain.

How to resolve: Use a domain you own. Spacefast assigns default hostnames automatically.

Error shape

Every Spacefast API error is an RFC 9457 problem document, served as application/problem+json.

code is stable and machine-readable.
type links to this page.
title is a short label.
status repeats the HTTP status.
detail explains this occurrence.
pointer, when present, is an RFC 6901 JSON Pointer at the offending field in the request body.
details, when present, carries structured context.

Match on code, never on detail.

{
  "type": "https://spacefast.com/docs/errors/domain_reserved_suffix",
  "title": "Domain reserved suffix",
  "status": 400,
  "detail": "The hostname is under a Spacefast-managed suffix and cannot be added as a domain.",
  "code": "domain_reserved_suffix",
  "requestId": "req_4mz0v8qk"
}

See the full list of error codes in the error reference.