# 热门咨询
#### 开放API
- [API的后端服务是否支持绑定私网ELB地址？](https://support.huaweicloud.com/apig_faq/apig-faq-2005003.html)
- [API的后端服务地址支持填写私有地址（子网IP）吗？](https://support.huaweicloud.com/apig_faq/apig-faq-2005006.html)
- [API可以绑定内网域名吗？](https://support.huaweicloud.com/apig_faq/apig-faq-2005021.html)
 
#### 调用API
- [调用API失败的可能原因](https://support.huaweicloud.com/apig_faq/apig-faq-2005010.html)
- [调用API报"The API does not exist or has not been published in the environment"](https://support.huaweicloud.com/apig_faq/apig-faq-19123002.html)
- [调用API报"No backend available"](https://support.huaweicloud.com/apig_faq/apig-faq-181016018.html)
- [API的后端服务报"Backend unavailable"或"Backend timeout"](https://support.huaweicloud.com/apig_faq/apig_0087908599.html)
 
#### API认证
- [APIG是否支持双向认证？](https://support.huaweicloud.com/apig_faq/apig-faq-2005013.html)
- [调用API提示AK/SK过期怎么处理？](https://support.huaweicloud.com/apig_faq/apig-faq-2005019.html)
 
#### API策略
- [是否支持对API的请求并发次数做控制？](https://support.huaweicloud.com/apig_faq/apig-faq-2005026.html)
- [API调用是否存在带宽限制](https://support.huaweicloud.com/apig_faq/apig-faq-19122002.html)
- [怎样给指定的用户开放API？](https://support.huaweicloud.com/apig_faq/apig-faq-2005008.html)
 
#### 导入导出API
- [导入API失败有哪些原因？](https://support.huaweicloud.com/apig_faq/apig-faq-2005024.html)
- [使用Swagger文件导入API时是否有模板？](https://support.huaweicloud.com/apig_faq/apig-faq-2005025.html)