Slack MCP

A community-maintained MCP server that provides connectors for popular SaaS tools, including Slack. It enables agents to interact with channels, messages, threads, reactions, users, files, and scheduled messages within Slack, working with hosts like Claude Desktop, Cursor, and Rebel.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by Mindstone

Vendor documentation

What you can do with it

Manage Slack channels and messages
Handle threads and reactions
Interact with users and files
Schedule messages in Slack

Source and maintenance

Community listingRegistry 0.3.3

mcp-registry: io.github.mindstone/mcp-server-slack@0.3.3 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@mindstone/mcp-server-slack 0.3.3

npmnpx

@mindstone/mcp-server-slack package definition

{
  "version": "0.3.3",
  "transport": "stdio",
  "identifier": "@mindstone/mcp-server-slack",
  "runtimeHint": "npx",
  "registryType": "npm",
  "registryBaseUrl": "https://registry.npmjs.org",
  "environmentVariables": [
    {
      "name": "SLACK_CONFIG_PATH",
      "format": "filepath",
      "isRequired": true,
      "description": "Path to the host-managed Slack config directory"
    },
    {
      "name": "SLACK_TEAM_ID",
      "format": "string",
      "isRequired": true,
      "description": "Slack workspace team ID (one process per workspace)"
    },
    {
      "name": "SLACK_CLIENT_ID",
      "format": "string",
      "description": "Slack OAuth Connected App client ID. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it."
    },
    {
      "name": "SLACK_CLIENT_SECRET",
      "format": "string",
      "description": "Slack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it."
    },
    {
      "name": "SLACK_DISABLE_REFRESH",
      "format": "string",
      "description": "Set to 1 to disable token refresh on this surface (cloud surface)"
    },
    {
      "name": "SLACK_REQUEST_TIMEOUT_MS",
      "format": "number",
      "default": "60000",
      "description": "Override the upstream timeout (max 300000ms = 5 min)"
    },
    {
      "name": "SLACK_MAX_RETRIES",
      "format": "number",
      "default": "10",
      "description": "WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs."
    },
    {
      "name": "MCP_WORKSPACE_PATH",
      "format": "filepath",
      "description": "Workspace directory upload_slack_file reads are constrained to (defaults to the system temp dir when unset)"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "slack-mcp-mindstone-mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack@0.3.3"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>",
        "MCP_WORKSPACE_PATH": "<YOUR_MCP_WORKSPACE_PATH>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "slack-mcp-mindstone-mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack@0.3.3"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>",
        "MCP_WORKSPACE_PATH": "<YOUR_MCP_WORKSPACE_PATH>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "slack-mcp-mindstone-mcp-server-slack": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack@0.3.3"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>",
        "MCP_WORKSPACE_PATH": "<YOUR_MCP_WORKSPACE_PATH>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "slack-mcp-mindstone-mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack@0.3.3"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>",
        "MCP_WORKSPACE_PATH": "<YOUR_MCP_WORKSPACE_PATH>"
      }
    }
  }
}

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