kmshack.kr API Problem Types

Errors use application/problem+json following RFC 9457.

• RESOURCE_NOT_FOUND (404): select a published path from OpenAPI.
• METHOD_NOT_ALLOWED (405): retry with a method in the Allow header.
• NOT_ACCEPTABLE (406): request an advertised representation.
• UPSTREAM_UNAVAILABLE (502): retry later with backoff.

Every problem includes type, title, status, detail, instance, code, message, and resolution.

• Canonical problem documentation
• OpenAPI specification
• Developer resources