Queries the source topics that are subscribed to by a specified custom topic.


Each Alibaba Cloud account can run a maximum of 50 queries per second (QPS).

Note RAM users of an Alibaba Cloud account share the quota of the account.


Alibaba Cloud provides OpenAPI Explorer to simplify API usage. OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes QueryTopicReverseRouteTable

The operation that you want to perform. Set the value to QueryTopicReverseRouteTable.

Topic String Yes /x7aWKW9***/testDataToDataHub/user/update

The destination topic that receives messages.

IotInstanceId String No iot-cn-0pp1n8t****

The ID of the instance. You can view the instance ID on the Overview page in the IoT Platform console.

  • If your instance has an ID, you must configure this parameter. If you do not set this parameter, the call fails.
  • If your instance has no Overview page or ID, you do not need to set this parameter.

For more information, see Overview.

RegionId String No cn-shanghai

The region where your devices reside. The region you specify must match the region that is specified in the console. Example: cn-shanghai.

Note This parameter is no longer used as an operation-specific request parameter. It is included in common request parameters.

In addition to the preceding operation-specific request parameters, you must specify common request parameters when you call this operation. For more information, see Common request parameters.

Response parameters

Parameter Type Example Description
Code String iot.system.SystemException

The error code returned if the call fails. For more information, see Error codes.

ErrorMessage String A system exception occurred.

The error message returned if the call fails.

RequestId String FCC27691-9151-4B93-9622-9C90F30542EC"

The ID of the request.

SrcTopics List ["/CXi4***/device1/user/get","/CXi4***/device4/user/get"]

The list of source topics returned if the call is successful.

Success Boolean true

Indicates whether the call was successful.

  • true: The call was successful.
  • false: The call failed.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

    "SrcTopics": {
        "Topic": ["/CXi4***/device1/user/get","/CXi4***/device4/user/get"]
    "RequestId": "C5515170-3C1F-4004-A7C1-181E7955BC73",
    "Success": true

Error codes

For a list of error codes, visit the API Error Center.