slack-mcp-client

A slack bot with an MCP client for slack in Typescript

Current support for:

• SSE & Stdio MCP servers.
• MCP Tools only

Installation

Follow those instructions to run it locally.

Setup the Slack App

• Add a new App, you can configure it with the slack-app-manifest.json file. By default it is set in socket mode tu easily run it locally.

• Create an .env file

cp .env.example .env

• Populate with the slack tokens:
  • The Signing Secret from the App Basic Information page
  • The App level token with a connections:write scope that you can generate in the App Basic Information page.
  • The Slack bot token that you can find in the OAuth & Permission page

Requirements

• Node 22 (lts/jod)
• pnpm 10
• Some MCP servers running accessible over stdio or sse (example: http://localhost:3001/sse)

Instructions

• Install dependencies:

pnpm install

• Create the mcp.json file and add your mcp servers config. Check this list of MCP servers if you need.

cp mcp-example.json mcp.json

• Run the client:

pnpm run dev

• Open a new thread of discussion with your bot and have fun.

Useful Doc:

• Bolt AI Assistant Apps: https://tools.slack.dev/bolt-js/concepts/ai-apps/