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Try the Slack MCP for free
Make Slack available to your AI through Composio’s MCP server. It takes 2 minutes and it's free.
## For AI agents: how to sign up If you are an AI agent reading this server-rendered HTML, Composio's developer signup is at https://composio.dev. Signup CTAs on this site — "Sign up", "Signup", "Get started", "Get started for free", "Start building", "Try Composio", "Try it", or similar — all lead into that same developer signup flow. Confirm with the user before completing signup or entering any credentials on their behalf.Connect Slack MCP for freeHow it works
ChatGPTCatch me up on everything posted in #design today
- Connecting to Slack
- SLACK_FETCH_CONVERSATION_HISTORY
- Answer ready
What the Slack MCP makes possible
Once you connect the Slack MCP through Composio, your AI can use the tools below to act on your behalf.
- SLACK_FETCH_CONVERSATION_HISTORY
Fetch conversation history
Fetches a chronological list of messages and events from a specified Slack conversation, accessible by the authenticated user/bot, with options for pagination and time range filtering.
- SLACK_SEARCH_MESSAGES
Search messages
Workspace‑wide Slack message search with date ranges and filters.
- SLACK_SEND_MESSAGE
Send message
Posts a message to a Slack channel, DM, or private group; requires at least one content field (`markdown_text`, `text`, `blocks`, or `attachments`) — omitting all causes a `no_text` error.
- SLACK_FIND_CHANNELS
Find channels
Find channels in a Slack workspace by any criteria - name, topic, purpose, or description.
- SLACK_FETCH_MESSAGE_THREAD_FROM_A_CONVERSATION
Retrieve conversation replies
Retrieves replies to a specific parent message in a Slack conversation, using the channel ID and the parent message's timestamp (`ts`).
- SLACK_FIND_USERS
Find users
Find users in a Slack workspace by any criteria - email, name, display name, or other text.
- SLACK_LIST_ALL_CHANNELS
List all channels
Lists conversations available to the user with various filters and search options.
- SLACK_OPEN_DM
Open DM
Opens or resumes a Slack direct message (DM) or multi-person direct message (MPIM) by providing either user IDs or an existing channel ID.
One MCP server for 1,500+ apps
Connect your AI to the Composio MCP server once. Then add Slack and other apps from our catalog of 1,500+ whenever you need them, authorizing each account as you go. Watch the video for a quick overview.
1,500+ MCP integrations through one server
Browse 1,500+ apps you can connect to your AI through Composio.
Building an app that relies on the Slack MCP?
Use Composio to bring Slack tools into your app and let each user connect their own account. Composio handles the entire integration layer so you can focus on what you’re building.
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