slack-mcp-server
Verified Safeby korotovsky
Overview
Model Context Protocol (MCP) server providing real-time and historical Slack data access to AI models.
Installation
npx -y slack-mcp-server@latest --transport stdioEnvironment Variables
- SLACK_MCP_XOXP_TOKEN
- SLACK_MCP_XOXB_TOKEN
- SLACK_MCP_XOXC_TOKEN
- SLACK_MCP_XOXD_TOKEN
Security Notes
The server can operate in 'stealth mode' using less secure browser session tokens (xoxc/xoxd), which require manual extraction. It explicitly allows disabling TLS certificate verification via `SLACK_MCP_SERVER_CA_INSECURE`, which is warned against but poses a significant risk if enabled. The `conversations_add_message` tool, capable of posting messages, is disabled by default and can be configured with channel-specific whitelists/blacklists, offering a good safeguard. The system's security relies heavily on sensitive Slack tokens and API keys provided via environment variables, mandating secure environment configuration. The `npx` installation method implicitly trusts the integrity of downloaded binaries for the respective OS/architecture.
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