Returned Values

Status Code

After sending a request, you will receive a response containing the status code, response header, and response body.

A status code is a group of digits ranging from 1xx to 5xx. It indicates the status of a response. For more information, see Status Code.

For example, if status code 201 is returned for calling the API used to obtain a user token, the request is successful.

Response Header

A response header corresponds to a request header, for example, Content-Type.

Figure 1 shows the response header for the API of obtaining a user token, in which x-subject-token is the desired user token. Then, you can use the token to authenticate the calling of other APIs.

**Figure 1** Header of the response to the request for obtaining a user token

Figure 1 Header of the response to the request for obtaining a user token

(Optional) Response Body

A response body is generally returned in a structured format, corresponding to the Content-Type in the response header, and is used to transfer content other than the response header.

The following shows part of the response body for the API to obtain a user token. For the sake of space, only part of the content is displayed here.

    "token": {
        "expires_at": "2019-02-13T06:52:13.855000Z",
        "methods": [
        "catalog": [
                "endpoints": [
                        "region_id": "xxxxxxxx",

If an error occurs during API calling, the system returns an error code and a message to you. The following shows the format of an error response body:

    "error": {
        "message": "The request you have made requires authentication.",
        "title": "Unauthorized"

In the preceding information, error_code is an error code, and error_msg describes the error.