Slack

Connect to Slack workspace. Send Messages as Bots or on behalf of users

Supports authentication: OAuth 2.0

Tool list

slack_send_message

Sends a message to a Slack channel or direct message. Requires a valid Slack OAuth2 connection with chat:write scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM
text	string	Yes	Message text content
blocks	string	No	JSON-encoded array of Block Kit block elements for rich message formatting
attachments	string	No	JSON-encoded array of legacy attachment objects for additional message formatting
thread_ts	string	No	Timestamp of parent message to reply in a thread
reply_broadcast	boolean	No	When true, broadcasts a thread reply to the entire channel
unfurl_links	boolean	No	Enable or disable link previews
unfurl_media	boolean	No	Enable or disable media link previews

slack_update_message

Updates/edits a previously sent message in a Slack channel or direct message. Requires a valid Slack OAuth2 connection with chat:write scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM where the message was sent
ts	string	Yes	Timestamp of the message to update
text	string	No	New message text content
blocks	string	No	JSON-encoded array of Block Kit block elements for rich message formatting
attachments	string	No	JSON-encoded array of legacy attachment objects for additional message formatting

slack_delete_message

Deletes a message from a Slack channel or direct message. Requires a valid Slack OAuth2 connection with chat:write scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM where the message was sent
ts	string	Yes	Timestamp of the message to delete

slack_add_reaction

Add an emoji reaction to a message in Slack. Requires a valid Slack OAuth2 connection with reactions:write scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID or channel name where the message exists
name	string	Yes	Emoji name to react with, without colons (e.g. thumbsup, heart, fire)
timestamp	string	Yes	Timestamp of the message to add the reaction to

slack_pin_message

Pin a message to a Slack channel. Pinned messages are highlighted and easily accessible to channel members. Requires a valid Slack OAuth2 connection with pins:write scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID or channel name where the message exists
timestamp	string	Yes	Timestamp of the message to pin

slack_create_channel

Creates a new public or private channel in a Slack workspace. Requires a valid Slack OAuth2 connection with channels:manage scope for public channels or groups:write for private channels.

Name	Type	Required	Description
name	string	Yes	Name of the channel to create, without # prefix. Must be lowercase, no spaces, 21 characters or fewer.
is_private	boolean	No	Set to true to create a private channel (default: false for public)
team_id	string	No	Encoded team ID for org-wide apps. Leave blank for regular workspace apps.

slack_fetch_conversation_history

Fetches conversation history from a Slack channel or direct message with pagination support. Requires a valid Slack OAuth2 connection with channels:history scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM
oldest	string	No	Start of time range — only messages after this timestamp are returned (e.g. 1715432100.123456)
latest	string	No	End of time range — only messages before this timestamp are returned (e.g. 1715432200.123456)
limit	integer	No	Number of messages to return, 1–1000 (default: 100)
cursor	string	No	Pagination cursor from a previous response to fetch the next page

slack_get_conversation_info

Retrieve information about a Slack channel, including metadata, settings, and member count. Requires a valid Slack OAuth2 connection with channels:read scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM
include_locale	boolean	No	Set to true to include locale information for this conversation
include_num_members	boolean	No	Set to true to include the member count in the response

slack_get_conversation_replies

Retrieve replies to a specific message thread in a Slack channel or direct message. Requires a valid Slack OAuth2 connection with channels:history or groups:history scope.

Name	Type	Required	Description
channel	string	Yes	Channel ID, channel name (e.g. #general), or user ID for DM
ts	string	Yes	Timestamp of the parent message whose thread replies to retrieve
oldest	string	No	Only include replies after this timestamp
latest	string	No	Only include replies before this timestamp
inclusive	boolean	No	Include messages with the latest or oldest timestamp in results
limit	integer	No	Number of replies to return (default: 100, max: 1000)
cursor	string	No	Pagination cursor from a previous response to fetch the next page

slack_invite_users_to_channel

Invites one or more users to a Slack channel. Requires a valid Slack OAuth2 connection with channels:write scope for public channels or groups:write for private channels.

Name	Type	Required	Description
channel	string	Yes	Channel ID or channel name (e.g. #general) to invite users to
users	string	Yes	Comma-separated list of user IDs to invite (e.g. U123456789,U987654321)

slack_join_conversation

Joins an existing Slack channel. The authenticated user will become a member of the channel. Requires a valid Slack OAuth2 connection with channels:write scope for public channels.

Name	Type	Required	Description
channel	string	Yes	Channel ID or channel name (e.g. #general) to join

slack_leave_conversation

Leaves a Slack channel. The authenticated user will be removed from the channel and will no longer receive its messages. Requires a valid Slack OAuth2 connection with channels:write scope for public channels or groups:write for private channels.

Name	Type	Required	Description
channel	string	Yes	Channel ID or channel name (e.g. #general) to leave

slack_list_channels

List all public and private channels in a Slack workspace that the authenticated user has access to. Requires a valid Slack OAuth2 connection with channels:read, groups:read, mpim:read, and/or im:read scopes depending on the conversation types needed.

Name	Type	Required	Description
types	string	No	Comma-separated channel types to include: public_channel, private_channel, mpim, im
exclude_archived	boolean	No	Set to true to exclude archived channels from results
limit	integer	No	Number of channels to return (default: 100, max: 1000)
team_id	string	No	Encoded team ID to list channels for a specific workspace
cursor	string	No	Pagination cursor from a previous response to fetch the next page

slack_list_users

Lists all users in a Slack workspace, including information about their status, profile, and presence. Requires a valid Slack OAuth2 connection with users:read scope.

Name	Type	Required	Description
limit	number	No	Number of users to return, 1–1000
include_locale	boolean	No	Set to true to include locale information for each user
team_id	string	No	Encoded team ID for org-wide apps. Leave blank for regular workspace apps.
cursor	string	No	Pagination cursor from a previous response to fetch the next page

slack_lookup_user_by_email

Find a user by their registered email address in a Slack workspace. Requires a valid Slack OAuth2 connection with users:read.email scope. Cannot be used by custom bot users.

Name	Type	Required	Description
email	string	Yes	Email address to search for (e.g. user@example.com)

slack_get_user_info

Retrieves detailed information about a specific Slack user, including profile data, status, and workspace information. Requires a valid Slack OAuth2 connection with users:read scope.

Name	Type	Required	Description
user	string	Yes	User ID to get information about (e.g. U123456789)
include_locale	boolean	No	Set to true to include locale information in the user profile

slack_get_user_presence

Gets the current presence status of a Slack user (active, away, etc.). Requires a valid Slack OAuth2 connection with users:read scope.

Name	Type	Required	Description
user	string	Yes	User ID to check presence for (e.g. U123456789)

slack_set_user_status

Set the authenticated user’s custom status with text and emoji. The status appears in their profile and can include an optional expiration time. Requires a valid Slack OAuth2 connection with users.profile:write scope.

Name	Type	Required	Description
status_text	string	No	Custom status text to display (e.g. In a meeting)
status_emoji	string	No	Emoji name without colons to display alongside the status (e.g. calendar, house)
status_expiration	integer	No	Unix timestamp when the status should automatically clear

slack_upload_file

Upload a file to Slack using the modern files.getUploadURLExternal and files.completeUploadExternal API methods. Requires a valid Slack OAuth2 connection with files:write scope.

Name	Type	Required	Description
filename	string	Yes	Name of the file to upload (e.g. document.pdf)
file_data	string	Yes	Base64-encoded file content or local file path to upload
length	integer	Yes	Size of the file in bytes
channels	string	No	Comma-separated list of channel IDs or names to share the file to
initial_comment	string	No	Optional comment to add when sharing the file
thread_ts	string	No	Timestamp of a parent message to share the file in a thread