Slack MCP Server

MCPOfficialOpen Source10.0

by mario-andreschak • Messaging & Collaboration

An MCP server that allows agents (like Claude) to interact with Slack workspaces for posting messages, reading channels and threads, managing reactions, and retrieving user info.

Example Use Cases

1
Post messages or reply in Slack channels and threads programmatically as part of an automation workflow.
2
Read channel history and thread replies to gather conversational context or monitor activity.
3
List workspace channels and fetch user profiles to route messages, mention users, or manage interactions.

Description

This repository provides a standalone MCP server implementation for the Slack API, extracted from the Model Context Protocol servers subtree. It exposes tools to list channels, post messages, reply in threads, add reactions, fetch channel history and thread replies, and retrieve user profiles. It's easy to install and run (npm build/run or via npx) and includes setup guidance for Slack app scopes and tokens. The project is open-source (MIT) and intended to integrate Slack capabilities into agent workflows.

Capabilities(20 total)

Tools (20)

slack_list_workspaces

List all connected Slack workspaces. Shows available workspaces and indicates which one is currently active.

slack_switch_workspace

Switch to a different Slack workspace. All subsequent Slack operations will use the selected workspace.

team_id:string*

slack_get_current_workspace

Get information about the currently active Slack workspace.

slack_list_channels

List all Slack channels (public and private) accessible to the user

types:stringexclude_archived:booleanlimit:numbercursor:string

slack_get_channel_info

Get detailed information about a specific Slack channel

channel_id:string*

Quick Actions

View on GitHub

Security

Scanned 2 month(s) ago

Risk Level

MINIMAL

Read-only data retrieval, no side effects

Trust Score

C50/100

4/17 checks passed

Scores are informational only and provided “as is” without warranty. AgentHotspot assumes no liability for actions taken based on these ratings.

Quick Stats

Service TypeMCP

Pricing ModelFree

Capabilities20 Tools / 0 Prompts / 0 Resources

Ownermario-andreschak

CategoryMessaging & Collaboration

DependenciesStandalone

Set Your Username