Slack (mindstone) MCP Server

Slack workspace MCP server - channels, messages, threads, reactions, users, files, bookmarks, and scheduled messages via the Slack Web API. Its 37 documented tools cover slack, message, channel, messages.

People connecting productivity tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

One of 41 MCP servers published from mindstone/mcp-servers. Stars and repository activity are shared across all of them. See all 41 →

VERIFIED ACTIVE

LAST COMMIT 2026-08-19 · VERIFIED 2026-08-25

NOASSERTION · TypeScript servers · how we verify → /methodology

01 · Install Slack (mindstone)

before you install - you'll need

Set SLACK_CONFIG_PATH, SLACK_TEAM_ID, SLACK_CLIENT_SECRET, SLACK_MAX_RETRIES, SLACK_CLIENT_ID, LIVE_PROBE_BOT_TOKEN, LIVE_PROBE_USER_TOKEN, LIVE_PROBE_TEAM_ID, LIVE_PROBE_TEST_CHANNEL_ID before connecting. SLACK_REQUEST_TIMEOUT_MS is optional or environment-specific per the README.

Claude Code

claude mcp add mindstone-mcp-servers-connectors-slack -- npx -y @mindstone/mcp-server-slack

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mindstone-mcp-servers-connectors-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

npm package @mindstone/mcp-server-slack - published under the repo owner's npm scope (@mindstone)

registry namespace io.github.mindstone is GitHub-verified and matches the repo owner

03 · What Slack (mindstone) can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can read structured auth_required response, get messages saved for later (uses is:saved). Same search-backend reporting as search_slack_messages, retrieve a message from its permalink URL, and open an inline editable compose form before sending.

Capability map

Tools grouped from the project's README - what Slack (mindstone) lets an agent do.

Slack

34 tools - e.g. Returns structured auth_required response; the host drives OAuth.; Check Slack connection status (connected, token health, near-expiry).; Get messages saved for later (uses is:saved). Same search-backend…

authenticate_slack_workspace · list_slack_workspaces · get_slack_saved_messages · get_slack_message_by_link · compose_slack_message · post_slack_message…

run & execute

1 tool - e.g. Send yourself a note that actually notifies you (posts a DM from the bot to the authenticated user). Use this for "jot something down" / reminders instead of a

send_myself_a_note

Invite

1 tool - e.g. Add users to a channel (bulk).

invite_user_to_channel

read & search

1 tool - e.g. Find a user by exact email (preferred resolution method).

lookup_user_by_email

04 · Who maintains Slack (mindstone)

Slack is maintained by mindstone. We track 41 MCP servers from mindstone - 41 actively maintained, 10 combined GitHub stars, oldest repo from Apr 2026. Full record: all servers from mindstone.

05 · Facts

repository: github.com/mindstone/mcp-servers
category: productivity - actively maintained as of 2026-08-25.
registry: io.github.mindstone/mcp-server-slack (active, first published 2026-05-21 · 6 versions)
packages: npm:@mindstone/mcp-server-slack

06 · Slack (mindstone) FAQ

Is Slack (mindstone) still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-19. We re-verify nightly.

What can Slack (mindstone) do?

How do I install Slack (mindstone)?

Run `npx -y @mindstone/mcp-server-slack`. The README documents 10 environment variables (SLACK_CONFIG_PATH, SLACK_TEAM_ID, SLACK_CLIENT_SECRET…) to set first. Set SLACK_CONFIG_PATH, SLACK_TEAM_ID, SLACK_CLIENT_SECRET, SLACK_MAX_RETRIES, SLACK_CLIENT_ID, LIVE_PROBE_BOT_TOKEN, LIVE_PROBE_USER_TOKEN, LIVE_PROBE_TEAM_ID, LIVE_PROBE_TEST_CHANNEL_ID before connecting. SLACK_REQUEST_TIMEOUT_MS is optional or environment-specific per the README. You can also paste the ready-made client config above.

Does Slack (mindstone) run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Slack (mindstone)

Alternatives to Slack (mindstone)

Maintained productivity servers if Slack (mindstone) isn't the fit.

Pairs well with

Servers that cover what Slack (mindstone) doesn't - only shown when the pairing reason fits the companion.

More productivity MCP servers · TalentLMS · Vanta · Wise · Workday · Xero