This topic describes the details about the request structure, including the endpoints of Security Token Service (STS), communications protocols, HTTP request methods, and request parameters.


For information about STS endpoints, see Endpoints.

Communications protocols

To ensure communication security, STS only allows you to send requests over HTTPS.

HTTP request methods

STS allows you to send HTTP GET and POST requests.

Note The size of each HTTP GET request cannot exceed 4 KB. The size of each HTTP POST request cannot exceed 10 MB.

Request parameters

You must specify the following parameters for each API request:

  • The Action parameter. It specifies the API operation you want to perform.
  • The common request parameters.
  • The request parameters that are specific to the API operation.

Character encoding

Requests and responses are UTF-8 encoded.