Last updated: 2022-01-17 10:20:26

1. API Description

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

This API is used to run a function.

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

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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: 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 Fill in RequestResponse for synchronized invocations (default and recommended) and Event for asychronized invocations. Note that for synchronized invocations, the max timeout period is 300s. Choose asychronized invocations if the required timeout period is longer than 300 seconds. You can also use InvokeFunction for synchronized invocations.
Qualifier No String The version or alias of the triggered function. It defaults to $LATEST
ClientContext No String Function running parameter, which is in the JSON format. The maximum parameter size is 6 MB for synchronized invocations and 128KB for asynchronized invocations. This field corresponds to event input parameter.
LogType No String Null for async invocations
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

https://scf.tencentcloudapi.com/?Action=Invoke
&FunctionName=xxxx
&<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

SDK

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 https://tencentcs.com/5jXKFnBW.
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.