{
  "type": "object",
  "description": "x402 V2 402 Payment Required Response\n\nThe official V2 format with top-level resource info and extensions support.",
  "required": [
    "x402Version",
    "resource",
    "accepts"
  ],
  "properties": {
    "accepts": {
      "type": "array",
      "items": {
        "$ref": "#/components/schemas/PaymentRequirements"
      },
      "description": "List of acceptable payment methods"
    },
    "error": {
      "type": [
        "string",
        "null"
      ],
      "description": "Error message explaining why payment is required"
    },
    "extensions": {
      "description": "Optional extensions (V2 feature for protocol extensibility)"
    },
    "resource": {
      "$ref": "#/components/schemas/ResourceInfo",
      "description": "Resource information (V2 - moved to top level)"
    },
    "x402Version": {
      "type": "integer",
      "format": "int32",
      "description": "x402 protocol version (2 for V2)",
      "minimum": 0
    }
  }
}