mcp-registry/slack-mcp-server

    ==================
      
       /// MCP ///
      /// SLA ///
        
    ==================
        
    [server:online]
    [protocol:ready]

slack-mcp-server

by korotovsky

Feature-rich Model Context Protocol (MCP) server that lets LLM agents read/search/post Slack messages in both OAuth and totally permission-less stealth modes. Supports Stdio & SSE transports, DM/Group-DM, smart history pagination, proxy routing, built-in caching and a rich tool set.

398
47
Open Source
GitHub

01

conversations_history

Retrieve messages from a channel or DM with optional inclusion of activity messages, time/count limits, and cursor-based pagination.

02

conversations_replies

Fetch a thread’s messages in a channel using channel ID and thread timestamp, with optional activity messages and cursor-based pagination.

03

conversations_add_message

Post a message to a channel, private channel, or DM (optionally into a thread). Disabled by default and can be restricted to specific channels.

04

conversations_search_messages

Search messages in channels, DMs, or threads using a query and various filters such as channel, users, dates, and pagination.

05

channels_list

Return a list of channels (public, private, IM, MPIM) with optional sorting, pagination cursor, and limit controls.

Installation

1. Install Go (≥1.21).
2. Fetch the server binary:
go install github.com/korotovsky/slack-mcp-server@latest
3. Export your Slack credentials (a classic bot token is enough; no extra OAuth scopes are required):
export SLACK_BOT_TOKEN=xoxb-******** # Optional: if you use a user token export SLACK_USER_TOKEN=xoxp-********
4. Start the server (Std-I/O transport):
slack-mcp-server
Or with Server-Sent-Events (SSE) transport on port 8080:
slack-mcp-server --transport=sse --addr=:8080
5. Point your MCP-aware client or agent at the selected transport (e.g., http://localhost:8080/) and start chatting.
6. To run in Docker instead:
docker run -e SLACK_BOT_TOKEN=... ghcr.io/korotovsky/slack-mcp-server:latest

Documentation

License: MIT License
Updated 7/30/2025

Table of Contents