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Chat App Message Service:ListChatGroupParticipants

Last Updated:Jun 08, 2026

Lists the members of an IM group.

Operation description

Important This operation is an internal preview feature. Contact your account manager to request access.
  • Before calling this operation, ensure you have created an IM group with an invitation link, and that members have joined by using that link.

  • To create an IM group and add an invitation link, call the AddChatGroup and AddChatGroupInviteLink operations.

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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

cams:ListChatGroupParticipants

list

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

BusinessNumber

string

Yes

The business number. You can call the ListChatGroup operation to obtain the business number.

8613800***

ChannelType

string

No

The channel type. Valid value:

  • WHATSAPP

Note

This operation supports only the WhatsApp channel.

WHATSAPP

GroupId

string

Yes

The group ID. You can call the ListChatGroup operation to obtain the group ID.

EA939****

CustSpaceId

string

Yes

This is the instance ID for direct customers or the SpaceId for ISV sub-customers. You can find the ID on the Channel Management page.

cams-k***

Page

object

No

The paging information.

Size

integer

No

The page size.

20

Index

integer

No

The page number.

1

Response elements

Element

Type

Description

Example

object

AccessDeniedDetail

string

The details about the access denial.

None

Message

string

The error message.

None

RequestId

string

The request ID.

90E63D28-E31D-1EB2-8939-A94866411B2O

Data

object

The response data.

Total

integer

The total number of participants.

8

List

array<object>

The list of group members.

object

Information about a group member.

ParticipantNumber

string

The phone number of the group member.

861382***

Code

string

The request status code. Valid values:

  • OK: The request was successful.

  • For other values, see the error code list.

OK

Success

boolean

Indicates whether the request was successful. Valid values:

  • true: The request was successful.

  • false: The request failed.

true

Examples

Success response

JSON format

{
  "AccessDeniedDetail": "None",
  "Message": "None",
  "RequestId": "90E63D28-E31D-1EB2-8939-A94866411B2O",
  "Data": {
    "Total": 8,
    "List": [
      {
        "ParticipantNumber": "861382***"
      }
    ]
  },
  "Code": "OK",
  "Success": true
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.