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    Function Compute:InvokeFunction

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    Function Compute:InvokeFunction

    Last Updated:Mar 13, 2026

    Invoke a function.

    Try it now

    Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

    Test

    RAM authorization

    The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

    • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

    • API: The API that you can call to perform the action.

    • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

    • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

      • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

      • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

    • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

    • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

    Action

    Access level

    Resource type

    Condition key

    Dependent action

    fc:InvokeFunction

    none

    *All Resource

    *

    		 None None

    Request syntax

    POST /2021-04-06/services/{serviceName}/functions/{functionName}/invocations HTTP/1.1

    Path Parameters

    Parameter

    Type

    Required

    Description

    Example
    serviceName

    string

    Yes

    The name of the service.

    demoService
    functionName

    string

    Yes

    The name of the function.

    demoFunction

    Request parameters

    Parameter

    Type

    Required

    Description

    Example
    X-Fc-Invocation-Type

    string

    No

    The invocation method. Valid values:

    • Sync: synchronous invocations

    • Async: asynchronous invocations

    Default value: Sync

    Sync
    X-Fc-Log-Type

    string

    No

    The method used to return logs. Valid values:

    • Tail: returns the last 4 KB of logs that are generated for the current request.

    • None: No logs are returned for the current request. Default value: None.

    None
    qualifier

    string

    No

    The version ID or alias of the service.

    demoQualifier
    body

    string

    No

    The event to be processed by the function. Set this parameter to a binary string. Function Compute passes the event to the function for processing.

    {"key":"value"}
    X-Fc-Stateful-Async-Invocation-Id

    string

    No

    The ID of the asynchronous task. You must enable the asynchronous task feature in advance.

    Note

    When you use an SDK to invoke a function, we recommend that you specify a business-related ID to facilitate subsequent operations. For example, you can use the video name as the invocation ID for a video-processing function. This way, you can use the ID to check whether the video is processed or terminate the processing of the video. The ID must start with a letter or an underscore (_) and can contain letters, digits, underscores (_), and hyphens (-). The ID can be up to 128 characters in length. If you do not specify the ID of the asynchronous invocation, Function Compute automatically generates an ID.

    test-invoke-id
    X-Fc-Stateful-Async-Invocation-Enable

    string

    No

    Specifies whether to enable the asynchronous task mode for requests. Default value: false. Valid values:

    • true

    • false

    Note

    This parameter takes effect only for asynchronous invocations. It does not take effect for synchronous invocations.

    true
    X-Fc-Account-Id

    string

    No

    The ID of your Alibaba Cloud account.

    188077086902****
    X-Fc-Date

    string

    No

    The time when the function is invoked. The format is EEE,d MMM yyyy HH:mm:ss GMT.

    Wed, 11 May 2022 09:00:00 GMT
    X-Fc-Trace-Id

    string

    No

    The trace ID of the request for Function Compute API. The value is the same as that of the requestId parameter in the response.

    test-trace-id

    Response elements

    Element

    Type

    Description

    Example

    string

    The return value for the request.

    hello world

    Examples

    Success response

    JSON format

    "hello world"

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.