Skip to main content
Glama
a-g-e-n-t-s

Slack Message Sender

by a-g-e-n-t-s
OverviewSchemaRelated ServersScoreDiscussions
TypeScript
Remote

MCP_Slack_Server

MCP Server that provides Slack message sending capabilities for Claude Desktop and KADI agents.

Overview

This server is part of the KADI Slack bot architecture. It:

  1. Provides stateless message sending tools

  2. Resolves channel names to IDs automatically

  3. Supports both direct messages and thread replies

  4. Works with Claude Desktop and Agent_TypeScript via KADI broker

Related MCP server: Slack MCP Server

Architecture

Claude Desktop / Agent_TypeScript
              ↓
      KADI Broker (MCP Upstream)
              ↓
    MCP_Slack_Server (this project)
              ↓
      Slack Web API
              ↓
         Slack Channel

Installation

cd C:\p4\Personal\SD\MCP_Slack_Server
npm install

Configuration

Create .env file:

SLACK_BOT_TOKEN=xoxb-your-bot-token
MCP_LOG_LEVEL=info

Required Slack Scopes

  • chat:write - Send messages to channels

  • chat:write.public - Send messages to public channels without joining

  • channels:read - List and resolve channel names

  • groups:read - Access private channels (if needed)

Usage

Development Mode

npm run dev

Production Mode

npm run build
npm start

As MCP Upstream (via KADI Broker)

Add to kadi-broker/mcp-upstreams.json:

{
  "id": "slack-server",
  "name": "Slack Message Sender",
  "type": "stdio",
  "prefix": "slack",
  "networks": ["global", "slack"],
  "stdio": {
    "command": "node",
    "args": ["C:/p4/Personal/SD/MCP_Slack_Server/dist/index.js"],
    "env": {
      "SLACK_BOT_TOKEN": "xoxb-..."
    }
  }
}

Tools

send_message

Send a message to a Slack channel.

Input:

{
  "channel": "#general",  // or "C09T6RU41HP"
  "text": "Hello from Claude!",
  "thread_ts": "1234567890.123456"  // optional
}

Output:

{
  "success": true,
  "message": "Message sent successfully",
  "timestamp": "1234567890.123456",
  "channel": "C09T6RU41HP"
}

send_reply

Reply to a message in a thread.

Input:

{
  "channel": "C09T6RU41HP",
  "thread_ts": "1234567890.123456",
  "text": "This is a threaded reply"
}

Output:

{
  "success": true,
  "message": "Reply sent successfully",
  "timestamp": "1234567890.654321",
  "channel": "C09T6RU41HP",
  "thread_ts": "1234567890.123456"
}

Integration Examples

From Claude Desktop

Send a message to #general saying "Hello team!"

From Agent_TypeScript

await client.getBrokerProtocol().invokeTool({
  targetAgent: 'slack-server',
  toolName: 'slack_send_message',
  toolInput: {
    channel: '#general',
    text: 'Hello from Agent_TypeScript!'
  },
  timeout: 10000
});

Reply to Slack Mention

// After getting mention from MCP_Slack_Client
const mention = mentions[0];

await client.getBrokerProtocol().invokeTool({
  targetAgent: 'slack-server',
  toolName: 'slack_send_reply',
  toolInput: {
    channel: mention.channel,
    thread_ts: mention.thread_ts,
    text: claudeResponse
  },
  timeout: 10000
});

License

MIT

Install Server
F
license - not found
A
quality
C
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
–Release cycle
–Releases (12mo)
Commit activity

Resources

Unclaimed servers have limited discoverability.

Looking for Admin?

If you are the server author, to access and configure the admin panel.

Tools

Latest Blog Posts

MCP directory API

We provide all the information about MCP servers via our MCP API.

curl -X GET 'https://glama.ai/api/mcp/v1/servers/a-g-e-n-t-s/mcp-server-slack'

If you have feedback or need assistance with the MCP directory API, please join our Discord server