MCP Tool Directory

Unarchives a specified public or private Slack channel that is currently archived, using its channel ID.

Reverses conversation archival.

Unpins a message, identified by its timestamp, from a specified channel if the message is currently pinned there; this operation is destructive.

Unpin a message from a channel.

Updates an existing Slack User Group, which must be specified by an existing `usergroup` ID, with new optional details such as its name, description, handle, or default channels.

Update an existing message. Bot can only update messages it posted. Provide new text and/or blocks.

Updates the title, join URL, or desktop app join URL for an existing Slack call identified by its ID.

Replaces all members of an existing Slack User Group with a new list of valid user IDs.

Updates a Slack message, identified by `channel` ID and `ts` timestamp, by modifying its `text`, `attachments`, or `blocks`; provide at least one content field, noting `attachments`/`blocks` are replaced if included (`[]` clears them).

Updates metadata or content details for an existing remote file in Slack; this action cannot upload new files or change the fundamental file type.

Upload a text file to Slack. Uses the 2-step upload process (getUploadURLExternal + completeUploadExternal). For text/code content only.

Uploads a file to Slack, requiring either `content` (for text) or `file` (for binary data), optionally sharing it in specified `channels` or as a reply via `thread_ts`.

DEPRECATED: Turns on Do Not Disturb mode for the current user, or changes its duration. Use `set_dnd_duration` instead.

DEPRECATED: Adds a custom emoji to a Slack workspace given a unique name and an image URL. Use `add_emoji` instead.

Adds a reference to an external file (e.g., Google Drive, Dropbox) to Slack for discovery and sharing, requiring a unique `external_id` and an `external_url` accessible by Slack.

Stars a channel, file, file comment, or a specific message in Slack.

Adds an alias for an existing custom emoji in a Slack Enterprise Grid organization.

Registers new participants added to a Slack call.

Adds a custom emoji to a Slack workspace given a unique name and an image URL; subject to workspace emoji limits.

Adds a specified emoji reaction to an existing message in a Slack channel, identified by its timestamp; does not remove or retrieve reactions.

Archives a Slack conversation by its ID, rendering it read-only and hidden while retaining history, ideal for cleaning up inactive channels; be aware that some channels (like #general or certain DMs) cannot be archived and this may impact connected integrations.

Archives a Slack public or private channel, making it read-only; the primary 'general' channel cannot be archived.

DEPRECATED: Posts a message to a Slack channel, direct message, or private channel. Use `send_message` instead.

Clears the Slack status for the authenticated user, removing any custom text and emoji.

Closes a Slack direct message (DM) or multi-person direct message (MPDM) channel, removing it from the user's sidebar without deleting history; this action affects only the calling user's view.

Creates a Slack reminder with specified text and time; time accepts Unix timestamps, seconds from now, or natural language (e.g., 'in 15 minutes', 'every Thursday at 2pm').

Creates a new User Group (often referred to as a subteam) in a Slack workspace.

Creates a new Slack Canvas with the specified title and optional content.

Creates a new public or private Slack channel with a unique name; the channel can be org-wide, or team-specific if `team_id` is given (required if `org_wide` is false or not provided).

Customizes URL previews (unfurling) in a specific Slack message using a URL-encoded JSON in `unfurls` to define custom content or remove existing previews.