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    Serverless App Engine:DescribeInstanceSpecifications

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    Serverless App Engine:DescribeInstanceSpecifications

    Last Updated:Apr 23, 2026

    Retrieves a list of available application instance specifications.

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    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

    sae:DescribeInstanceSpecifications

    get

    *All Resource

    *

    		 None None

    Request syntax

    GET /pop/v1/paas/quota/instanceSpecifications HTTP/1.1

    Request parameters

    Parameter

    Type

    Required

    Description

    Example

    No parameters required.

    Response elements

    Element

    Type

    Description

    Example

    object

    The returned data.

    RequestId

    string

    The request ID.

    91F93257-7A4A-4BD3-9A7E-2F6EAE6D****
    Message

    string

    The returned message.

    • If the request is successful, success is returned.

    • If the request fails, an error message is returned.

    success
    TraceId

    string

    The trace ID that is used to query the details of a request.

    0a98a02315955564772843261e****
    Data

    array<object>

    The instance specifications.

    object

    The instance specifications.

    Cpu

    integer

    The CPU specification. Unit: millicores.

    2000
    Version

    integer

    The version of the instance specification.

    0
    Memory

    integer

    The memory specification. Unit: MB.

    4096
    SpecInfo

    string

    The name of the instance specification.

    General-purpose 4
    Id

    integer

    The ID of the instance specification.

    4
    Enable

    boolean

    Indicates whether the instance specification is available. Valid values:

    • true: available

    • false: unavailable

    true
    ErrorCode

    string

    The error code.

    • The ErrorCode parameter is not returned if the request is successful.

    • The ErrorCode parameter is returned if the request fails. For more information, see the Error codes section of this topic.

    Code

    string

    The HTTP status code. Valid values:

    • 2xx: The request is successful.

    • 3xx: The request is redirected.

    • 4xx: The request is invalid.

    • 5xx: A server error occurs.

    200
    Success

    boolean

    Indicates whether the instance specifications are obtained. Valid values:

    • true: The instance specifications are obtained.

    • false: The instance specifications fail to be obtained.

    true

    Examples

    Success response

    JSON format

    {
  "RequestId": "91F93257-7A4A-4BD3-9A7E-2F6EAE6D****",
  "Message": "success",
  "TraceId": "0a98a02315955564772843261e****",
  "Data": [
    {
      "Cpu": 2000,
      "Version": 0,
      "Memory": 4096,
      "SpecInfo": "General-purpose 4",
      "Id": 4,
      "Enable": true
    }
  ],
  "ErrorCode": "",
  "Code": "200",
  "Success": true
}

    Error codes

    See Error Codes for a complete list.

    Release notes

    See Release Notes for a complete list.