Retrieve a thread of messages posted to a conversation

This Conversations API method's required scopes depend on the type of channel-like object you're working with. To use the method, you'll need at least one of the channels:, groups:, im: or mpim: scopes corresponding to the conversation type you're working with.

This Conversations API method returns an entire thread (a message plus all the messages in reply to it), while conversations.history method returns only parent messages.

The scopes and token types required to use this method vary by conversation type.

Bot user tokens may use this method for direct message and multi-party direct message conversations but lack sufficient permissions to use this method on public and private channels.

To use conversations.replies with public or private channel threads, use a user token with channels:history or groups:history scopes.



Authentication token bearing required scopes.


Conversation ID to fetch thread from.


Unique identifier of a thread's parent message.


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.


Include messages with latest or oldest timestamp in results only when either timestamp is specified.

Default: 0


End of time range of messages to include in results.

Default: now


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.

Default: 10


Start of time range of messages to include in results.

Default: 0


Present arguments as parameters in application/x-www-form-urlencoded querystring or POST body. This method does not currently accept application/json.

The channel and ts arguments are always required. ts must be the timestamp of an existing message with 0 or more replies. If there are no replies then just the single message referenced by ts will return - it is just an ordinary message.


Typical success response

    "messages": [
            "type": "message",
            "user": "U061F7AUR",
            "text": "island",
            "thread_ts": "1482960137.003543",
            "reply_count": 3,
            "subscribed": true,
            "last_read": "1484678597.521003",
            "unread_count": 0,
            "ts": "1482960137.003543"
            "type": "message",
            "user": "U061F7AUR",
            "text": "one island",
            "thread_ts": "1482960137.003543",
            "parent_user_id": "U061F7AUR",
            "ts": "1483037603.017503"
            "type": "message",
            "user": "U061F7AUR",
            "text": "two island",
            "thread_ts": "1482960137.003543",
            "parent_user_id": "U061F7AUR",
            "ts": "1483051909.018632"
            "type": "message",
            "user": "U061F7AUR",
            "text": "three for the land",
            "thread_ts": "1482960137.003543",
            "parent_user_id": "U061F7AUR",
            "ts": "1483125339.020269"
    "has_more": true,
    "ok": true,
    "response_metadata": {
        "next_cursor": "bmV4dF90czoxNDg0Njc4MjkwNTE3MDkx"

Typical error response

    "ok": false,
    "error": "thread_not_found"


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.

See pagination for more information.

Pagination by time

You can also get messages of certain time range by specifying either or combination of both latest and oldest.

If a message has the same timestamp as latest or oldest it will not be included in the list. This allows a client to fetch all messages in a hole in channel history, by calling conversations.replies with latest set to the oldest message they have after the hole, and oldest to the latest message they have before the hole. However, you can cover the hole and include the exact moment of the specified timestamp, set inclusive to true. The inclusive is ignored when latest or oldest is not specified.


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.


Value for channel was missing or invalid.


Value for ts was missing or invalid.


The token used is not granted the specific scope permissions required to complete this request.


Value passed for cursor was not valid or is no longer valid.


Value passed for latest was invalid


Value passed for oldest was invalid


No authentication token provided.


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.


Authentication token is for a deleted user or workspace.


Authentication token is for a deleted user or workspace or the app has been removed.


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.


The workspace is undergoing an enterprise migration and will not be available until migration is complete.


Administrators have suspended the ability to post a message.


The method was called with invalid arguments.


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.


The method was called via a POST request, but the charset specified in the Content-Type header was invalid. Valid charset names are: utf-8 iso-8859-1.


The method was called via a POST request with Content-Type application/x-www-form-urlencoded or multipart/form-data, but the form data was either missing or syntactically invalid.


The method was called via a POST request, but the specified Content-Type was invalid. Valid types are: application/json application/x-www-form-urlencoded multipart/form-data text/plain.


The method was called via a POST request and included a data payload, but the request did not include a Content-Type header.


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.


The method was called via a POST request, but the POST data was either missing or truncated.


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.


The server could not complete your operation(s) without encountering an error, likely due to a transient issue on our end. It's possible some aspect of the operation succeeded before the error was raised.


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.


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.


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.

tokenRequiredNeed a token? Create and install a Slack app to begin.
inclusiveOptional, default=0
latestOptional, default=now
limitOptional, default=10
oldestOptional, default=0
Extra args