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Official · by Slack

Slack MCP server

The Slack MCP server lets AI assistants look up channel content, post and schedule messages, read threads, and manage files, reactions, users, and lists.

  • Hosted (remote)
  • Verified against its source 19 Oct 2026
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What the Slack MCP server does

Slack's developer docs list this hosted server, which lets integrated apps such as Claude Code and Cursor run Slack actions. Available actions include searching messages and files by date, user, or content type; posting to any conversation type; scheduling future messages; reading full channel histories and threads; creating channels, group DMs, or IMs; adding and retrieving emoji reactions; exporting canvases as markdown; fetching complete user profiles; listing channel member IDs; uploading files in two steps; and creating, reading, and updating lists and records. The server is at https://mcp.slack.com/mcp and authenticates through Slack OAuth. Only Marketplace-published and internal apps may use it, requests honor any configured IP allowlist, and it uses JSON-RPC 2.0 over Streamable HTTP without SSE or Dynamic Client Registration.

Tools it gives your assistant

14 tools or toolsets, as its documentation lists them.

  • Search messages & filestoolset Searches messages and files, filterable by date, user, and content type
  • Send message Sends messages to any type of Slack conversation
  • Schedule message Schedules a message to send at a future time
  • Read a channel Reads the complete message history of channels
  • Read a thread Reads complete message thread conversations
  • Create conversation/channel Creates a new channel, group DM, or IM on behalf of the user
  • Add reactions Adds an emoji reaction to a message
  • Get reactions Retrieves emoji reactions on a message
  • Read a canvas Exports canvases as markdown files
  • Fetch user info Accesses full user profile info, including custom fields and statuses
  • List channel members Retrieves user IDs of members of a channel or conversation
  • Upload files Uploads files to Slack in a two-step process
  • Create and read lists Creates Slack lists with custom schemas and reads their contents
  • Update lists and records Updates list metadata, columns, and records

How to install it

Hosted server

Add this address to your assistant's MCP settings:

https://mcp.slack.com/mcp

What you need

In the Slack documentation's own words:

  • “Slack supports confidential OAuth for MCP clients. You'll need to use your app's client_id and client_secret for Slack OAuth”
  • “Only apps published in the Slack Marketplace and internal apps can use MCP at this time”
  • “If your app has allowed IP address ranges configured, requests to the Slack MCP server are subject to the same restrictions”
  • “We do not support SSE-based connections or Dynamic Client Registration at this time”

Commands and settings change between versions. Check the official instructions before you install.