Slack CLI MCP Server

Example Use Cases

• 1

  Programmatically read and manage Slack channels, messages, users, files, and reactions.

• 2

  A reliable MCP server interface to Slack with automatic handling of pagination and rate limits.

• 3

  That require a read-only mode to safely access Slack data without risk of accidental writes.

Description

slackcli is a Slack CLI and MCP server designed specifically for LLM-powered agents to interact with Slack reliably. It provides JSON-first output, structured error codes, automatic pagination, and rate limit retries to facilitate seamless AI integration. The tool supports both read-only and write operations, with a read-only mode to prevent accidental modifications by AI agents. It can be used as a standalone CLI or integrated as an MCP server for AI agent workflows.