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Slack MCP Server

@ubie-oss

RepositoryHomepage

Basic information

Category

Communication

License

Apache-2.0

Transports

stdio

Author

ubie-oss

About Slack MCP Server

A Slack MCP server

Slack MCP Server config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "slack-mcp-server-ubie-oss": {
      "command": "npx",
      "args": [
        "@ubie-oss/slack-mcp-server"
      ]
    }
  }
}

Slack MCP Server tools

Tool list not available yet

This listing does not currently have a tool list to display. This does not mean the server has no tools; check its documentation for supported capabilities.

Fetch the live tool list by running this server in a temporary sandbox using the button above.

Overview

What is slack-mcp-server?

An MCP (Model Context Protocol) server that provides a standardized interface for AI assistants to interact with the Slack API. It allows reading and writing Slack data through configurable bot and user tokens.

How to use slack-mcp-server?

Install via npm install @ubie-oss/slack-mcp-server, set environment variables SLACK_BOT_TOKEN and SLACK_USER_TOKEN (and optionally SLACK_SAFE_SEARCH), then run with npx @ubie-oss/slack-mcp-server (default stdio) or with -port 3000 for Streamable HTTP. Configure clients with the provided JSON block.

Key features of slack-mcp-server?

  • List public channels with pagination
  • Post messages and reply to threads
  • Add emoji reactions to messages
  • Retrieve channel history and thread replies
  • Search messages with powerful filters
  • Get user profiles in bulk

Use cases of slack-mcp-server?

  • Automate sending notifications or updates to Slack channels
  • Search workspace messages using date, user, and content filters
  • Manage thread discussions by posting replies and reading history
  • Fetch user profile information in batch for AI-driven workflows
  • Enable AI assistants to interact with Slack via MCP-compatible clients

Frequently asked questions

1

What tokens are required?

`SLACK_BOT_TOKEN` (bot user OAuth token) is required for most operations. `SLACK_USER_TOKEN` (user OAuth token) is needed for features like message search.

2

What does `SLACK_SAFE_SEARCH` do?

When set to `true`, it automatically excludes private channels, DMs, and group DMs from search results. This is enforced server-side and cannot be overridden by clients.

3

What transports are supported?

Stdio transport (default for local integration) and Streamable HTTP transport (specify with `-port 3000` for web applications). The HTTP endpoint is `http://localhost:3000/mcp`.

4

Where is this package hosted and how do I authenticate?

The package is hosted on GitHub Registry.

Comments

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