tencent cloud



最后更新时间:2022-02-23 10:28:30

1. API Description

Domain name for API request: cvm.tencentcloudapi.com.

This API is used to query the Virtual Network Console (VNC) URL of an instance for its login to the VNC.

  • It does not support STOPPED CVMs.

  • A VNC URL is only valid for 15 seconds. If you do not access the URL within 15 seconds, it will become invalid and you have to query a URL again.

  • Once the VNC URL is accessed, it will become invalid and you have to query a URL again if needed.

  • If the connection is interrupted, you can make up to 30 reconnection attempts per minute.

  • After getting the value InstanceVncUrl, you need to append InstanceVncUrl=xxxx to the end of the link https://img.qcloud.com/qcloud/app/active_vnc/index.html?.

    • InstanceVncUrl: its value will be returned after the API is successfully called.

      The final URL is in the following format:


A maximum of 10 requests can be initiated per second for this API.

We recommend you to use API Explorer
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2. Input Parameters

The following request parameter list only provides API request parameters and some common parameters. For the complete common parameter list, see Common Request Parameters.
This document describes the parameters for Signature V1. It's recommended to use the V3 signature, which provides higher security. Note that for Signature V3, the common parameters need to be placed in the HTTP Header. See details.

Parameter Name Required Type Description
Action Yes String Common parameter. The value used for this API: DescribeInstanceVncUrl.
Version Yes String Common parameter. The value used for this API: 2017-03-12.
Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
InstanceId Yes String Instance ID. To obtain the instance IDs, you can call DescribeInstances and look for InstanceId in the response.

3. Output Parameters

Parameter Name Type Description
InstanceVncUrl String Instance VNC URL.
RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

4. Example

Example1 Querying the VNC URL of an instance

This example shows you how to query the VNC URL of an instance.

Input Example

GET https://cvm.tencentcloudapi.com/?Action=DescribeInstanceVncUrl
&<Common request parameters>

Output Example

  "Response": {
    "InstanceVncUrl": "wss%3A%2F%2Fbjvnc.qcloud.com%3A26789%2Fvnc%3Fs%3DaHpjWnRVMFNhYmxKdDM5MjRHNlVTSVQwajNUSW0wb2tBbmFtREFCTmFrcy8vUUNPMG0wSHZNOUUxRm5PMmUzWmFDcWlOdDJIbUJxSTZDL0RXcHZxYnZZMmRkWWZWcEZia2lyb09XMzdKNmM9",
    "RequestId": "6ef60bec-0242-43af-bb20-270359fb54a7"

5. Developer Resources


TencentCloud API 3.0 integrates SDKs that support various programming languages to make it easier for you to call APIs.

Command Line Interface

6. Error Code

The following only lists the error codes related to the API business logic. For other error codes, see Common Error Codes.

Error Code Description
InvalidInstance.NotSupported This instance is not supported.
InvalidInstanceId.Malformed Invalid instance ID. The specified instance ID has an invalid format. For example, ins-1122 has an invalid ID length.
InvalidInstanceId.NotFound No instance found.
InvalidInstanceState This operation cannot be performed due to the current instance status.
OperationDenied.InstanceOperationInProgress The instance has an operation in progress. Please try again later.
UnauthorizedOperation.MFAExpired Unauthorized operation. Make sure Multi-Factor Authentication (MFA) is valid.
UnauthorizedOperation.MFANotFound Unauthorized operation. Make sure Multi-Factor Authentication (MFA) exists.
UnsupportedOperation.InstanceStateEnterRescueMode Instances are entering the rescue mode, and this operation is not supported.
UnsupportedOperation.InstanceStateEnterServiceLiveMigrate The instance ins-xxxxxx in the ENTER_SERVICE_LIVE_MIGRATE status is not supported.
UnsupportedOperation.InstanceStateExitRescueMode Instances are exiting from the rescue mode, and this operation is not supported.
UnsupportedOperation.InstanceStateExitServiceLiveMigrate The instance ins-xxxxxx in the EXIT_SERVICE_LIVE_MIGRATE status is not supported.
UnsupportedOperation.InstanceStatePending The instances are being created, and this operation is not supported.
UnsupportedOperation.InstanceStateRebooting The instances are being restarted, and this operation is not supported.
UnsupportedOperation.InstanceStateShutdown Isolated instances do not support this operation.
UnsupportedOperation.InstanceStateStarting The instance is starting up, and this operation is not supported.
UnsupportedOperation.InstanceStateStopped The instance has been shut down, and this operation is not supported.
UnsupportedOperation.InstanceStateStopping The instance is being shut down, and this operation is not supported.
UnsupportedOperation.InstanceStateTerminated Terminated instances are not supported.
UnsupportedOperation.InstanceStateTerminating The instance is being terminated, and the operation is not supported.
UnsupportedOperation.SpecialInstanceType This special instance type does not support the operation.
UnsupportedOperation.StoppedModeStopCharging The instance does not support the no charges when shut down feature.




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