As part of the Conversations API, this method's required scopes depend on the type of channel-like object you're working with. For classic Slack apps, a corresponding channels: scope is required when working with public channels, groups: for private channels, also the same rules are applied for im: and mpim:. For workspace apps, a conversations: scope is all that's needed.
Paginate through collections of data by setting the cursor parameter to a next_cursor attribute returned by a previous request's response_metadata. Default value fetches the first "page" of the collection. See pagination for more detail.
limit
20
Optional, default=100
The maximum number of items to return. Fewer than the requested number of items may be returned, even if the end of the users list hasn't been reached.
Present arguments as parameters in application/x-www-form-urlencoded querystring or POST body. This method does not currently accept application/json.
Response
Returns a list of user IDs belonging to the members in a conversation.
Typical error response when an invalid cursor is provided
{
"ok": false,
"error": "invalid_cursor"
}
Pagination
This method uses cursor-based pagination to make it easier to incrementally collect information. To begin pagination, specify a limit value under 1000. We recommend no more than 200 results at a time.
Responses will include a top-level response_metadata attribute containing a next_cursor value. By using this value as a cursor parameter in a subsequent request, along with limit, you may navigate through the collection page by virtual page.
This table lists the expected errors that this method could return. However, other errors can be returned in the case where the service is down or other unexpected factors affect processing. Callers should always check the value of the ok params in the response.
Error
Description
method_not_supported_for_channel_type
This type of conversation cannot be used with this method.
missing_scope
The token used is not granted the specific scope permissions required to complete this request.
channel_not_found
Value passed for channel was invalid.
invalid_limit
Value passed for limit was invalid.
invalid_cursor
Value passed for cursor was invalid.
fetch_members_failed
Failed to fetch members for the conversation.
not_authed
No authentication token provided.
invalid_auth
Some aspect of authentication cannot be validated. Either the provided token is invalid or the request originates from an IP address disallowed from making the request.
account_inactive
Authentication token is for a deleted user or workspace.
token_revoked
Authentication token is for a deleted user or workspace or the app has been removed.
no_permission
The workspace token used in this request does not have the permissions necessary to complete the request. Make sure your app is a member of the conversation it's attempting to post a message to.
org_login_required
The workspace is undergoing an enterprise migration and will not be available until migration is complete.
ekm_access_denied
Administrators have suspended the ability to post a message.
invalid_arguments
The method was called with invalid arguments.
invalid_arg_name
The method was passed an argument whose name falls outside the bounds of accepted or expected values. This includes very long names and names with non-alphanumeric characters other than _. If you get this error, it is typically an indication that you have made a very malformed API call.
invalid_charset
The method was called via a POST request, but the charset specified in the Content-Type header was invalid. Valid charset names are: utf-8iso-8859-1.
invalid_form_data
The method was called via a POST request with Content-Typeapplication/x-www-form-urlencoded or multipart/form-data, but the form data was either missing or syntactically invalid.
invalid_post_type
The method was called via a POST request, but the specified Content-Type was invalid. Valid types are: application/jsonapplication/x-www-form-urlencodedmultipart/form-datatext/plain.
missing_post_type
The method was called via a POST request and included a data payload, but the request did not include a Content-Type header.
team_added_to_org
The workspace associated with your request is currently undergoing migration to an Enterprise Organization. Web API and other platform operations will be intermittently unavailable until the transition is complete.
request_timeout
The method was called via a POST request, but the POST data was either missing or truncated.
fatal_error
The server could not complete your operation(s) without encountering a catastrophic error. It's possible some aspect of the operation succeeded before the error was raised.
Warnings
This table lists the expected warnings that this method will return. However, other warnings can be returned in the case where the service is experiencing unexpected trouble.
Warning
Description
missing_charset
The method was called via a POST request, and recommended practice for the specified Content-Type is to include a charset parameter. However, no charset was present. Specifically, non-form-data content types (e.g. text/plain) are the ones for which charset is recommended.
superfluous_charset
The method was called via a POST request, and the specified Content-Type is not defined to understand the charset parameter. However, charset was in fact present. Specifically, form-data content types (e.g. multipart/form-data) are the ones for which charset is superfluous.