slack-mcp-serverThe most powerful MCP Slack Server with Stdio and SSE transports, Proxy support and no permission requirements on Slack Workspace!

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Reviewed by Daniel Nikulshyn·Updated July 2026

Overview

slack-mcp-server is a Model Context Protocol (MCP) server for Slack Workspaces. It's a feature-rich server that supports multiple transports (Stdio, SSE, HTTP), proxy settings, and various modes of operation, including stealth mode with no permission requirements and OAuth mode. The server allows for fetching messages from channels and threads, smart history retrieval, unread message management, and search functionality. It's designed to work with Enterprise Slack setups and supports direct messages, group direct messages, and embedded user information.

Key features

Stealth and OAuth Modes
Stdio/SSE/HTTP Transports
Proxy Support
Channel and Thread Support
Smart History Fetching
Unread Messages Management

Pricing

Model: Free
Category: MCP Servers
Rating: No reviews yet

Use cases

Slack Workspace Monitoring

Use slack-mcp-server to monitor and fetch messages from various channels and threads in a Slack Workspace, enabling efficient information retrieval and analysis.

Automation and Integration

Leverage the server's support for multiple transports and proxy settings to integrate Slack functionality with custom automation tools or workflows.

Pros & Cons

Pros

No permission requirements in stealth mode
Supports multiple transports (Stdio, SSE, HTTP)
Smart history retrieval by date or message count
Unread message management with priority sorting
Search functionality in channels, threads, and DMs

Cons

Complexity of setup and configuration
Potential performance impact due to extensive feature set

Reviews

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Q&A

What features are available for message management?

The server allows for smart history retrieval, unread message management with priority sorting, and search functionality in channels, threads, and DMs.

Asked by Margaret Whitfield · Oct 7, 2025

Does the server require permissions?

In stealth mode, the server does not require additional permissions or bot installations, while OAuth mode uses secure tokens for access.

Asked by Abebe Girma · Oct 3, 2025

What transports are available?

The server supports multiple transports, including Stdio, SSE, and HTTP, allowing for compatibility with various MCP clients.

Asked by Kalinda Reddy · Aug 28, 2025

What modes does slack-mcp-server support?

Slack-mcp-server supports stealth mode and OAuth mode, allowing for flexibility in permission requirements and access.

Asked by Bruno Kaufmann · Aug 21, 2025