This topic describes the request structure used when you call API operations of Auto Scaling (ESS).

Endpoints

To reduce network latency, we recommend that you configure endpoints based on your business location. The following table describes the ESS endpoints.
Region Public endpoint VPC endpoint
Default ess.aliyuncs.com None
China (Qingdao) ess.aliyuncs.com ess-vpc.cn-qingdao.aliyuncs.com
China (Beijing) ess.aliyuncs.com ess-vpc.cn-beijing.aliyuncs.com
China (Zhangjiakou-Beijing Winter Olympics) ess.cn-zhangjiakou.aliyuncs.com ess-vpc.cn-zhangjiakou.aliyuncs.com
China (Hohhot) ess.cn-huhehaote.aliyuncs.com ess-vpc.cn-huhehaote.aliyuncs.com
China (Ulanqab) ess.cn-wulanchabu.aliyuncs.com ess-vpc.cn-wulanchabu.aliyuncs.com
China (Hangzhou) ess.aliyuncs.com ess-vpc.cn-hangzhou.aliyuncs.com
China (Shanghai) ess.aliyuncs.com ess-vpc.cn-shanghai.aliyuncs.com
China (Shenzhen) ess.aliyuncs.com ess-vpc.cn-shenzhen.aliyuncs.com
China (Heyuan) ess.cn-heyuan.aliyuncs.com ess-vpc.cn-heyuan.aliyuncs.com
China (Chengdu) ess.cn-chengdu.aliyuncs.com ess-vpc.cn-chengdu.aliyuncs.com
China (Hong Kong) ess.aliyuncs.com ess-vpc.cn-hongkong.aliyuncs.com
Singapore ess.aliyuncs.com ess-vpc.ap-southeast-1.aliyuncs.com
Australia (Sydney) ess.ap-southeast-2.aliyuncs.com ess-vpc.ap-southeast-2.aliyuncs.com
Malaysia (Kuala Lumpur) ess.ap-southeast-3.aliyuncs.com ess-vpc.ap-southeast-3.aliyuncs.com
Indonesia (Jakarta) ess.ap-southeast-5.aliyuncs.com ess-vpc.ap-southeast-5.aliyuncs.com
Japan (Tokyo) ess.ap-northeast-1.aliyuncs.com ess-vpc.ap-northeast-1.aliyuncs.com
UK (London) ess.eu-west-1.aliyuncs.com ess-vpc.eu-west-1.aliyuncs.com
US (Silicon Valley) ess.aliyuncs.com ess-vpc.us-west-1.aliyuncs.com
US (Virginia) ess.aliyuncs.com ess-vpc.us-east-1.aliyuncs.com
Germany (Frankfurt) ess.eu-central-1.aliyuncs.com ess-vpc.eu-central-1.aliyuncs.com
UAE (Dubai) ess.me-east-1.aliyuncs.com ess-vpc.me-east-1.aliyuncs.com
India (Mumbai) ess.ap-south-1.aliyuncs.com ess-vpc.ap-south-1.aliyuncs.com

Protocols

You can send requests over HTTP or HTTPS. For a higher level of security, we recommend that you send requests over HTTPS.

Methods

You can send requests by using the HTTP GET method. In an HTTP GET request, the request parameters must be included in the request URL.

Parameters

For each request, you must specify the operation that you want to perform, such as CreateScalingGroup. Additionally, each request must contain the common request parameters and operation-specific request parameters.

Encoding

All requests and responses are encoded in UTF-8.