{
  "$id": "http-problem-details.json",
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "HTTP Problem Details",
  "description": "Schema describing the Problem Details for HTTP APIs format as defined in RFC 9457, providing a standardized way to carry machine-readable details of errors in HTTP response bodies.",
  "type": "object",
  "properties": {
    "type": {
      "type": "string",
      "format": "uri",
      "description": "A URI reference that identifies the problem type. When dereferenced, it should provide human-readable documentation for the problem type. The value 'about:blank' indicates that the problem has no additional semantics beyond the HTTP status code (RFC 9457 Section 3.1.1).",
      "default": "about:blank",
      "examples": [
        "https://example.com/problems/out-of-credit",
        "about:blank"
      ]
    },
    "title": {
      "type": "string",
      "description": "A short, human-readable summary of the problem type. It should not change from occurrence to occurrence of the problem (RFC 9457 Section 3.1.2).",
      "examples": [
        "You do not have enough credit.",
        "Not Found",
        "Service Unavailable"
      ]
    },
    "status": {
      "type": "integer",
      "description": "The HTTP status code generated by the origin server for this occurrence of the problem (RFC 9457 Section 3.1.3).",
      "minimum": 100,
      "maximum": 599,
      "examples": [
        400,
        403,
        404,
        500,
        503
      ]
    },
    "detail": {
      "type": "string",
      "description": "A human-readable explanation specific to this occurrence of the problem (RFC 9457 Section 3.1.4).",
      "examples": [
        "Your current balance is 30, but the item costs 50.",
        "The requested resource was not found on this server."
      ]
    },
    "instance": {
      "type": "string",
      "format": "uri-reference",
      "description": "A URI reference that identifies the specific occurrence of the problem. It may or may not yield further information if dereferenced (RFC 9457 Section 3.1.5).",
      "examples": [
        "/account/12345/transactions/67890",
        "urn:uuid:d9e35127-e9b1-4b3c-a0a5-6a83b2c4f5e6"
      ]
    }
  },
  "additionalProperties": true
}