Last updated: 2021-05-25 17:04:03

1. API Description

Domain name for API request:

This API is used to run a function.

A maximum of 100 requests can be initiated per second for this API.

Note: This API supports Finance regions. If the common parameter Region is a Finance region, a domain name with the Finance region needs to be specified, for example:

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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.

Parameter Name Required Type Description
Action Yes String Common parameter. The value used for this API: Invoke.
Version Yes String Common parameter. The value used for this API: 2018-04-16.
Region Yes String Common parameter. For more information, please see the list of regions supported by the product.
FunctionName Yes String Function name
InvocationType No String The value is RequestResponse (synchronous) or Event (asynchronous). The default value is synchronous.
Qualifier No String Version number or name of the triggered function
ClientContext No String Function running parameter, which is in the JSON format. Maximum parameter size is 1 MB.
LogType No String If this field is specified during sync invocation, the returned value will contain 4 KB of logs. Valid values: None, Tail. Default value: None. If the value is Tail, the Log field in the returned parameter will contain the corresponding function execution log
Namespace No String Namespace
RoutingKey No String Traffic routing config in json format, e.g., {"k":"v"}. Please note that both "k" and "v" must be strings. Up to 1024 bytes allowed.

3. Output Parameters

Parameter Name Type Description
Result Result Function execution result
RequestId String The unique request ID, which is returned for each request. RequestId is required for locating a problem.

4. Example

Example1 Running function

Input Example
&<Common request parameters>

Output Example

  "Response": {
    "Result": {
      "MemUsage": 3207168,
      "Log": "",
      "RetMsg": "hello from scf",
      "BillDuration": 100,
      "FunctionRequestId": "6add56fa-58f1-11e8-89a9-5254005d5fdb",
      "Duration": 0.826,
      "ErrMsg": "",
      "InvokeResult": 0
    "RequestId": "c2af8a64-c922-4d55-aee0-bd86a5c2cd12"

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
FailedOperation.FunctionStatusError Operation failed. The function is deploying.
FailedOperation.InvokeFunction Failed to invoke the function.
InternalError Internal error.
InternalError.System Internal system error.
InvalidParameter.FunctionName The value of FunctionName does not conform to the specification. Please fix it and try again. For more information, please visit
InvalidParameterValue Incorrect parameter value.
InvalidParameterValue.Param The input parameter is not in the standard JSON format.
ResourceNotFound.Function The function does not exist.
ResourceNotFound.FunctionName The function does not exist.
ResourceUnavailable.InsufficientBalance Your balance is insufficient. Please top up first.
UnauthorizedOperation.CAM CAM authentication failed.