Slack
MCP server for Slack Web API — send messages, manage channels, search content, and automate your workspace.
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)
How to connect
How to connect Slack to Claude
The server address to paste into Claude settings:
https://slack--node2flow.run.tools
- Open Claude (claude.ai or the desktop app).
- Go to Settings → Connectors.
- Click Add custom connector.
- Paste the server address copied below into Remote MCP server URL and click Add.
- In a chat, click + → Connectors and switch the new connector on.
Custom connectors are available on Free, Pro, Max, Team and Enterprise plans (Free is limited to one). On Team and Enterprise an organization Owner adds the connector first under Organization settings → Connectors.
Authorization
After you click Add, a sign-in window for the service opens. Sign in with your own account and approve access. Claude never sees your password.
How to connect Slack to ChatGPT
The server address to paste into ChatGPT settings:
https://slack--node2flow.run.tools
- Open ChatGPT in a browser (chatgpt.com). A Plus, Pro, Business, Enterprise or Edu plan is required.
- Turn on developer mode once: Settings → Apps → Advanced settings → Developer mode.
- Open Settings → Connectors and click Create.
- Fill in the form: Name (anything), Description (one line about what the service does), MCP server URL (copy it below).
- Under Authentication choose OAuth if the service requires sign-in, otherwise None. Click Create.
- In a new chat open + → Apps/Connectors and enable the connector.
OpenAI has renamed this section before (Connectors → Apps/Plugins). If the label differs, search settings for "developer mode". On Business/Enterprise workspaces an admin must allow custom connectors first.
Authorization
On first use ChatGPT opens the service's sign-in window. Sign in and approve access.
How to connect Slack to Cursor
The server address to paste into Cursor settings:
https://slack--node2flow.run.tools
Fastest: click Open in Cursor below and confirm the prompt.
Manually:
- In Cursor open Settings → Cursor Settings → MCP and click Add new global MCP server.
- Paste the JSON copied below into
~/.cursor/mcp.json(per project:.cursor/mcp.jsonin the repo root). - Save the file. The server appears in the MCP list; authorize it there if asked.
Authorization
If the service needs sign-in, an authorize button appears next to the server in the MCP list.
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. |