# 計費說明

## 一、計費模式

1. 計費條件：僅當單次請求返回 `200` 狀態碼時計費，其他狀態碼均不計費。

       注意：搜尋請求成功是指接收到成功的回應，而非取決於返回結果的數量。

## 二、狀態碼對照表

| 狀態碼   | 名稱                    | 說明                                  | 是否扣費 |
| ----- | --------------------- | ----------------------------------- | ---- |
| `200` | Success               | 請求流程正常，成功獲取搜索引擎結果頁完整數據。             | 扣費   |
| `300` | Not collected         | 由於解析失敗導致未採集到有效數據                    | 不扣費  |
| `400` | Bad Request           | 傳參錯誤                                | 不扣費  |
| `401` | Unauthorized          | 認證權限失效，需檢查 token 有效性                | 不扣費  |
| `403` | Forbidden             | 目標網站伺服器拒絕執行                         | 不扣費  |
| `404` | Not Found             | 請求的資源不存在                            | 不扣費  |
| `429` | Too Many Requests     | 請求頻次超過 API 預設閾值（如併發請求數或時間窗口內請求量超限）。 | 不扣費  |
| `500` | Internal Server Error | 伺服器內部錯誤                             | 不扣費  |
| `504` | Timeout Error         | 代理伺服器等待上游伺服器回應超時。                   | 不扣費  |


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```

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