Slack
MCP server for Slack Web API — send messages, manage channels, search content, and automate your workspace.
Community: Submitted by a user or imported; check the owner before granting accessOnlineAPI key requiredGlobalFreeCan modify data
What it can do
- Slack Send Message: Send a message to a Slack channel, DM, or thread. Supports Block Kit for rich formatting. Always provide "text" as notification fallback even when using "blocks". Rate limit: 1 mes
- Slack Update Message: Update an existing message. Bot can only update messages it posted. Provide new text and/or blocks.
- Slack Delete Message: Delete a message. Bot can only delete messages it posted.
What data it sees
Do you need an account
An API key from the service settings is required
MCP server for Slack Web API — send messages, manage channels, search content, and automate your workspace.
Features
- Send, update, delete, and schedule messages with Block Kit support
- Manage channels: create, archive, invite/kick members, set topics
- Search messages and files with Slack's powerful query syntax
- Upload and manage files with 2-step upload process
- React to messages, pin items, and manage bookmarks
- Browse users, team info, and custom emoji
38 Tools
Messages (7): send, update, delete, schedule, cancel scheduled, list scheduled, get permalink Conversations (12): list channels, info, history, thread replies, members, create, archive, invite, kick, join, set topic, open DM Users (2): list all, get info Reactions (3): add, remove, get reactions Search (2): search messages, search files Files (3): upload, list, delete Pins (3): pin, unpin, list pins Bookmarks (4): add, edit, remove, list Team (1): get workspace info Emoji (1): list custom emoji
Configuration
- SLACK_BOT_TOKEN — Get one at https://api.slack.com/apps (create app → OAuth & Permissions → Install → copy Bot Token)
Server tool list (38)
Raw names from tools/list. Only developers need these.
| slack_send_message | Send a message to a Slack channel, DM, or thread. Supports Block Kit for rich formatting. Always provide "text" as notification fallback even when using "blocks". Rate limit: 1 message/sec/channel. |
| slack_update_message | Update an existing message. Bot can only update messages it posted. Provide new text and/or blocks. |
| slack_delete_message | Delete a message. Bot can only delete messages it posted. |
| slack_schedule_message | Schedule a message for future delivery. Max 120 days in the future. Max 30 scheduled messages per channel per 5 minutes. |
| slack_delete_scheduled_message | Delete a pending scheduled message before it is sent. Cannot delete messages posting within 60 seconds. |
| slack_list_scheduled_messages | List pending scheduled messages. Optionally filter by channel or time range. |
| slack_get_permalink | Get a permanent URL for a specific message. |
| slack_list_channels | List channels in the workspace. Filter by type: public_channel, private_channel, im, mpim. |
| slack_get_channel_info | Get detailed information about a channel including topic, purpose, member count. |
| slack_get_channel_history | Get message history from a channel. Returns messages in reverse chronological order. Free plan: 90-day history limit. |
| slack_get_thread_replies | Get replies in a message thread. Returns the parent message and all replies. |
| slack_get_channel_members | List all members of a channel. Returns user IDs with cursor-based pagination. |
| slack_create_channel | Create a new public or private channel. Name must be lowercase, numbers, hyphens, underscores (max 80 chars). |
| slack_archive_channel | Archive a channel. Archived channels can be unarchived later. |
| slack_invite_to_channel | Invite one or more users to a channel. Supports up to 1000 user IDs. |
| slack_kick_from_channel | Remove a user from a channel. |
| slack_join_channel | Join a public channel. Bot must have channels:join scope. |
| slack_set_channel_topic | Set or update the topic of a channel. |
| slack_open_conversation | Open a DM or multi-person DM. Pass 1 user ID for DM, 2-8 for group DM. |
| slack_list_users | List all users in the workspace including deactivated users. Supports cursor-based pagination. |
| slack_get_user_info | Get detailed information about a user including profile, status, admin flags. |
| slack_add_reaction | Add an emoji reaction to a message. Use emoji name without colons (e.g. "thumbsup" not ":thumbsup:"). |
| slack_remove_reaction | Remove an emoji reaction from a message. |
| slack_get_reactions | Get all reactions for a specific message, including emoji names, counts, and user IDs. |
| slack_search_messages | Search for messages matching a query. Supports modifiers: in:#channel, from:@user, has:reaction, before:date, after:date. Free plan: 90-day history limit. |
| slack_search_files | Search for files matching a query. Supports same modifiers as message search. |
| slack_upload_file | Upload a text file to Slack. Uses the 2-step upload process (getUploadURLExternal + completeUploadExternal). For text/code content only. |
| slack_list_files | List files in the workspace. Filter by channel, user, or type. Free plan: files older than 90 days are deleted. |
| slack_delete_file | Delete a file from the workspace. |
| slack_pin_message | Pin a message to a channel. Cannot pin channel join messages or files. |
| slack_unpin_message | Unpin a message from a channel. |
| slack_list_pins | List all pinned items in a channel. |
| slack_add_bookmark | Add a bookmark (link) to a channel. Max 100 bookmarks per channel. |
| slack_edit_bookmark | Update an existing bookmark in a channel. |
| slack_remove_bookmark | Remove a bookmark from a channel. |
| slack_list_bookmarks | List all bookmarks in a channel. |
| slack_get_team_info | Get information about the workspace/team: name, domain, icon, etc. |
| slack_list_emoji | List all custom emoji in the workspace. Returns emoji name-to-URL mapping. Aliases use "alias:emoji_name" format. |