rtm.start

Starts a Real Time Messaging session.

Supported token types:

bot user

Expected scopes:

rtm:stream client

This method begins a Real Time Messaging API session and reserves your application a specific URL with which to connect via websocket.

It's user-centric and team-centric: your app connects as a specific user or bot user on a specific team. Many apps will find the Events API's subscription model more scalable when working against multiple teams.

This method also returns a smorgasbord of data about the team, its channels, and members. Some times more information than can be provided in a timely or helpful manner.

Please use rtm.connect instead, especially when connecting on behalf of an Enterprise Grid customer.

Consult the RTM API documentation for full details on using the RTM API. You'll also find our changelog entry useful.

Arguments

This method has the URL https://slack.com/api/rtm.start and follows the Slack Web API calling conventions.

Present these parameters as part of an application/x-www-form-urlencoded querystring or POST body. application/json is not currently accepted.

Argument	Example	Required	Description
`token`	`xxxx-xxxxxxxxx-xxxx`	Required	Authentication token bearing required scopes.
`batch_presence_aware`	`1`	Optional, default=false	Group presence change notices as `presence_change_batch` events when possible. See batching.
`include_locale`	`true`	Optional	Set this to `true` to receive the locale for users and channels. Defaults to `false`
`mpim_aware`	`true`	Optional	Returns MPIMs to the client in the API response.
`no_latest`	`1`	Optional, default=0	Exclude latest timestamps for channels, groups, mpims, and ims. Automatically sets `no_unreads` to `1`
`no_unreads`	`true`	Optional	Skip unread counts for each channel (improves performance).
`presence_sub`	`true`	Optional, default=false	Only deliver presence events when requested by subscription. See presence subscriptions.
`simple_latest`	`true`	Optional	Return timestamp only for latest message object of each channel (improves performance).

Note that setting no_latest=1 will automatically set no_unreads=1.

Response

This method returns lots of data about the current state of a team, along with a WebSocket Message Server URL:

{
    "ok": true,
    "url": "wss:\/\/ms9.slack-msgs.com\/websocket\/7I5yBpcvk",

    "self": {
        "id": "U023BECGF",
        "name": "bobby",
        "prefs": {
            ...
        },
        "created": 1402463766,
        "manual_presence": "active"
    },
    "team": {
        "id": "T024BE7LD",
        "name": "Example Team",
        "email_domain": "",
        "domain": "example",
        "icon": {
            ...
        },
        "msg_edit_window_mins": -1,
        "over_storage_limit": false
        "prefs": {
            ...
        },
        "plan": "std"
    },
    "users": [ ... ],

    "channels": [ ... ],
    "groups": [ ... ],
    "mpims": [ ... ],
    "ims": [ ... ],

    "bots": [ ... ],
}

The url property contains a WebSocket Message Server URL. Connecting to this URL will initiate a Real Time Messaging session. These URLs are only valid for 30 seconds, so connect quickly!

The self property contains details on the authenticated user.

The team property contains details on the authenticated user's team. If a team has not yet set a custom icon, the value of team.icon.image_default will be true.

The users property contains a list of user objects, one for every member of the team.

The channels property is a list of channel objects, one for every channel visible to the authenticated user. For regular or administrator accounts this list will include every team channel. The is_member property indicates if the user is a member of this channel. If true then the channel object will also include the topic, purpose, member list and read-state related information. The latest, unread_count, and unread_count_display attributes have been removed from this method's response. See this changelog entry.

The groups property is a list of group objects, one for every group the authenticated user is in.

The mpims property is a list of mpims objects, one for every group the authenticated user is in. MPIMs are only returned to the client if mpim_aware is set when calling rtm.start. Otherwise, mpims are emulated using the groups API.

The ims property is a list of IM objects, one for every direct message channel visible to the authenticated user.

The bots property gives details of the integrations set up on this team.

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
`migration_in_progress`	Team is being migrated between servers. See the `team_migration_started` event documentation for details.
`not_authed`	No authentication token provided.
`invalid_auth`	Invalid authentication token.
`account_inactive`	Authentication token is for a deleted user or workspace.
`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 a PHP-style array argument (e.g. with a name like `foo[7]`). These are never valid with the Slack API.
`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/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.
`request_timeout`	The method was called via a `POST` request, but the `POST` data was either missing or truncated.

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.

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rtm.start

Arguments

Response

Errors

Warnings

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