Go to Slack


Retrieve a thread of messages posted to a channel


Method URL: https://slack.com/api/channels.replies
Preferred HTTP method: GET
Accepted content types: application/x-www-form-urlencoded
Rate limiting: Tier 3
Works with:
Token type Required scope(s)
bot bot
user channels:history

This method returns an entire thread (a message plus all the messages in reply to it).

Bots belonging to Slack apps are not supported

This method cannot be called with bot user tokens belonging to Slack apps, although legacy bot tokens will work. To use this method in a Slack app, use a user token imbued with the necessary scope. Stay tuned for updates as we bring a fuller feast of features to bots belonging to Slack apps.


Argument Example Required Description
token xxxx-xxxxxxxxx-xxxx Required

Authentication token bearing required scopes.

channel C1234567890 Required

Channel to fetch thread from

thread_ts 1234567890.123456 Required

Unique identifier of a thread's parent message

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 thread_ts arguments are always required. thread_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 thread_ts will be returned - it is just an ordinary message.

Sample Response

Typical success response

    "has_more": false,
    "messages": [
            "last_read": "1509484885.000082",
            "replies": [
                    "ts": "1509484424.000601",
                    "user": "U2U85N1RZ"
                    "ts": "1509484885.000082",
                    "user": "U2U85N1RZ"
            "reply_count": 2,
            "subscribed": true,
            "text": "This is a channel message",
            "thread_ts": "1485913694.000025",
            "ts": "1485913694.000025",
            "type": "message",
            "unread_count": 0,
            "user": "U2X9P5FEL"
            "parent_user_id": "U2X9P5FEL",
            "text": "This is a thread reply",
            "thread_ts": "1485913694.000025",
            "ts": "1509484424.000601",
            "type": "message",
            "user": "U2U85N1RZ"
            "parent_user_id": "U2X9P5FEL",
            "text": "This is another thread reply",
            "thread_ts": "1485913694.000025",
            "ts": "1509484885.000082",
            "type": "message",
            "user": "U2U85N1RZ"
    "ok": true

Typical error response

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


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

Value for channel was missing or invalid.


Value for thread_ts was missing or 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.


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 passed a PHP-style array argument (e.g. with a name like foo[7]). These are never valid with the Slack API.


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/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.


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

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.