> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bentoo.net/llms.txt
> Use this file to discover all available pages before exploring further.

# Call Notes

1. **Key Security**: The API key is bound to all proxy permissions of the account. Leakage may lead to proxy theft and traffic loss. If a leak occurs, reset the key immediately and check the account for abnormal usage records.
2. **Request Rate Limit**: A single key is limited to a maximum of **5 interface calls per second**. Exceeding this limit will return a **429 status code** (too many requests). Pause for 1-2 minutes before calling again to avoid continuously triggering the limit.
3. **Plan Permission Differentiation**:
   1. **Traffic Plan**: Supports all interfaces, including the region filtering parameter.
   2. **Unlimited Plan**: Calling the region filtering interface will return a **403 permission error**; other interfaces can be used normally.
4. **Parameter Format Validation**: Parameters such as date, region code, and session duration must be passed strictly in the format shown in the examples. Otherwise, a **400 parameter error** will be returned (e.g., sticky session duration exceeding 120 minutes, invalid region code).
5. **Troubleshooting**: When a call fails, quickly locate the problem based on the status code:
   * **401**: Invalid or expired key. Verify the key or generate a new one.
   * **403**: Insufficient permissions (plan expired / Unlimited Plan calling the region filtering interface).
   * **404**: Incorrect interface URL. Verify against the official documentation.
   * **500**: Server exception. Retry later or contact customer support.