{
  "success": true,
  "error": null,
  "projects": [
    {
      "project_id": 1,
      "project_name": "Jupiter",
      "symbol": "JUP",
      "market_cap": 1200000000
    }
  ],
  "metadata": {
    "filter_mode": "direct",
    "total_results": 1,
    "limit": 20
  }
}

{
  "error": "Validation failed",
  "details": [
    "limit must be a number between 1 and 100"
  ]
}

{
  "error": "Missing API key. Expected Authorization: Bearer <api-key> or x-kanarie-api-key: <api-key>."
}

{
  "x402Version": 2,
  "error": "Payment required",
  "accepts": [
    {}
  ]
}

{
  "error": "Invalid API key"
}

{
  "error": "Rate limit exceeded",
  "limit": 123,
  "plan": "casual",
  "window": "15 minutes",
  "retryAfter": 900
}

{
  "error": "Internal server error"
}