Argument	Type	Description
`token`Required	token	Authentication token bearing required scopes. Tokens should be passed as an HTTP Authorization header or alternatively, as a POST parameter. Example`xxxx-xxxxxxxxx-xxxx`
`channel`	string	The channel of the scheduled messages Example`C123456789`
`cursor`	string	For pagination purposes, this is the `cursor` value returned from a previous call to `chat.scheduledmessages.list` indicating where you want to start this call from. Example`dXNlcjpVMDYxTkZUVDI=`
`latest`	string	A UNIX timestamp of the latest value in the time range Example`1562137200`
`limit`	integer	Maximum number of original entries to return. Example`100`
`oldest`	string	A UNIX timestamp of the oldest value in the time range Example`1562137200`
`team_id`	string	encoded team id to list channels in, required if org token is used Example`T1234567890`

This method supports application/json via HTTP POST. Present your token in your request's Authorization header. Learn more.

Example responses

Common successful response

Typical success response

{
    "ok": true,
    "scheduled_messages": [
        {
            "id": 1298393284,
            "channel_id": "C1H9RESGL",
            "post_at": 1551991428,
            "date_created": 1551891734,
            "text": "Here's a message for you in the future"
        }
    ],
    "response_metadata": {
        "next_cursor": ""
    }
}

Common error response

Typical error response if the channel passed is invalid

{
    "ok": false,
    "error": "invalid_channel"
}

This method returns a list of pending scheduled messages.

oldest signifies the UNIX timestamp of the earliest range you're interested in. latest signifies the latest. If both oldest and latest are specified, oldest must be less than latest.

Errors

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
`invalid_channel`	The channel passed is invalid
`invalid_ts_latest` [hidden]	invalid ts latest (generated)
`invalid_token`	Token is invalid
`invalid_cursor`	Provided cursor is invalid
`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 when using a `bot` token.
`token_revoked`	Authentication token is for a deleted user or workspace or the app has been removed when using a `user` token.
`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.
`missing_scope`	The token used is not granted the specific scope permissions required to complete this request.
`not_allowed_token_type`	The token type used in this request is not allowed.
`method_deprecated`	The method has been deprecated.
`deprecated_endpoint`	The endpoint has been deprecated.
`two_factor_setup_required`	Two factor setup is required.
`enterprise_is_restricted`	The method cannot be called from an Enterprise.
`team_access_not_granted`	The token used is not granted the specific workspace access required to complete this request.
`invalid_arguments`	The method was either called with invalid arguments or some detail about the arguments passed are invalid, which is more likely when using complex arguments like blocks or attachments.
`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_array_arg`	The method was passed an array as an argument. Please only input valid strings.
`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-8` `iso-8859-1`.
`invalid_form_data`	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.
`invalid_post_type`	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`.
`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.
`invalid_json` [hidden]	The method was called via a `POST` request with `Content-Type` `application/json`, but the body was not valid JSON.
`json_not_object` [hidden]	The method was called via a `POST` request a valid JSON body, but the JSON value was not an object.
`ratelimited`	The request has been ratelimited. Refer to the `Retry-After` header for when to retry the request.
`accesslimited`	Access to this method is limited on the current network
`request_timeout`	The method was called via a `POST` request, but the `POST` data was either missing or truncated.
`upgrade_required` [hidden]	The calling application needs to be upgraded.
`service_unavailable`	The service is temporarily unavailable
`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.
`internal_error`	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.

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.

API response

URL

POST body

Submit your arguments to see the API response

Listing scheduled messages

Java

JavaScript

Python

HTTP

Java

import com.slack.api.Slack;
import com.slack.api.methods.SlackApiException;
import org.slf4j.LoggerFactory;

import java.io.IOException;

public class ChatScheduledMessagesList {

    /**
     * Lists scheduled messages using latest and oldest timestamps
     */
    static void listScheduledMessages(String latest, String oldest) {
        // you can get this instance via ctx.client() in a Bolt app
        var client = Slack.getInstance().methods();
        var logger = LoggerFactory.getLogger("my-awesome-slack-app");
        try {
            // Call the chat.scheduledMessages.list method using the built-in WebClient
            var result = client.chatScheduledMessagesList(r -> r
                // The token you used to initialize your app
                .token(System.getenv("SLACK_BOT_TOKEN"))
                .latest(latest)
                .oldest(oldest)
            );
            // Print scheduled messages
            for (var message : result.getScheduledMessages()) {
                logger.info("message: {}", message);
            }
            // Print result
            logger.info("result: {}", result);
        } catch (IOException | SlackApiException e) {
            logger.error("error: {}", e.getMessage(), e);
        }
    }

    public static void main(String[] args) throws Exception {
        listScheduledMessages("1551991429", "1551991427");
    }

}

JavaScript

Code to initialize Bolt app
// Require the Node Slack SDK package (github.com/slackapi/node-slack-sdk)
const { WebClient, LogLevel } = require("@slack/web-api");

// WebClient insantiates a client that can call API methods
// When using Bolt, you can use either `app.client` or the `client` passed to listeners.
const client = new WebClient("xoxb-your-token", {
  // LogLevel can be imported and used to make debugging simpler
  logLevel: LogLevel.DEBUG
});
// List scheduled messages using latest and oldest timestamps
async function listScheduledMessages(latest, oldest) {
  try {
    // Call the chat.scheduledMessages.list method using the WebClient
    const result = await client.chat.scheduledMessages.list({
      latest: latest,
      oldest: oldest
    });

    // Print scheduled messages
    for (const message of result.scheduled_messages) {
      console.log(message);
    }
  }
  catch (error) {
    console.error(error);
  }
}

listScheduledMessages("1551991429", "2661991427");

Python

Code to initialize Bolt app
import os
import logging
from slack_sdk.errors import SlackApiError
from slack_sdk.web import WebClient

client = WebClient(token=os.environ["SLACK_BOT_TOKEN"])
logger = logging.getLogger(__name__)

# List scheduled messages using latest and oldest timestamps
def list_scheduled_messages(latest, oldest):
    try:
        # Call the chat.scheduledMessages.list method using the WebClient
        result = client.chat_scheduledMessages_list(
            latest=latest, 
            oldest=oldest
        )

        # Print scheduled messages
        for message in result["scheduled_messages"]:
            logger.info(message)

    except SlackApiError as e:
        logger.error("Error creating conversation: {}".format(e))


list_scheduled_messages("1551991429", "2661991427")

HTTP

POST https://slack.com/api/chat.scheduledMessages.list
Content-type: application/json
Authorization: Bearer xoxb-your-token
{
    "channel": "YOUR_CHANNEL_ID",
    "latest": 1551991429,
    "oldest": 1551991427,
}

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