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Slack

Team messaging in channels and direct messages.

Updated Sep 27, 2026

Overview

Slack is team messaging: channels, direct messages, files and workflows.

The MCP server acts as the signed-in user, and a workspace admin must approve MCP access first. The Web API and the CLI's slack api command call the same methods with a bot token (xoxb-) from an app installed in the workspace; slack api reads it from SLACK_BOT_TOKEN.