# Slack MCP Server

An MCP server implementation that enables Claude to interact with Slack workspaces through the Slack API.

## Installation

```bash
npm install @microagents/server-slack
# or
yarn add @microagents/server-slack
```

## Usage

### Direct Execution

```bash
# Set your API tokens and run
SLACK_BOT_TOKEN=xoxb-your-token SLACK_TEAM_ID=T0123456 npx @microagents/server-slack
```

### With Claude Desktop

Add this to your `claude_desktop_config.json`:

```json
{
  "mcpServers": {
    "slack": {
      "command": "npx",
      "args": ["@microagents/server-slack"],
      "env": {
        "SLACK_BOT_TOKEN": "xoxb-your-token",
        "SLACK_TEAM_ID": "T0123456"
      }
    }
  }
}
```

## Setup

1. **Create a Slack App**:
   * Go to [Slack API: Applications](https://api.slack.com/apps)
   * Click "Create New App" and choose "From scratch"
   * Name your app and select your workspace

2. **Add Bot Scopes**:
   * Navigate to "OAuth & Permissions"
   * Under "Scopes", add these Bot Token Scopes:
     - `channels:history`
     - `channels:read`
     - `chat:write`
     - `reactions:write`
     - `users:read`

3. **Install the App**:
   * Click "Install to Workspace"
   * Authorize the requested permissions

4. **Get Credentials**:
   * Copy the "Bot User OAuth Token" (starts with `xoxb-`)
   * Get your Team ID from your Slack URL or workspace settings

## Features

* **Channel Management**: List channels and retrieve channel history
* **Messaging**: Send messages to channels and threads
* **Reactions**: Add emoji reactions to messages
* **User Information**: Get user details and profiles

## Tools

### listChannels

List all channels in the workspace.

**Inputs:**
- `types` (string, optional): Types of channels to include (public, private, mpim, im)
- `excludeArchived` (boolean, optional): Whether to exclude archived channels

### getChannelHistory

Get message history from a channel.

**Inputs:**
- `channelId` (string): ID of the channel
- `limit` (number, optional): Number of messages to retrieve
- `oldest` (string, optional): Start of time range (timestamp)
- `latest` (string, optional): End of time range (timestamp)

### postMessage

Send a message to a channel or thread.

**Inputs:**
- `channelId` (string): ID of the channel
- `text` (string): Message text
- `threadTs` (string, optional): Thread timestamp to reply to

### addReaction

Add an emoji reaction to a message.

**Inputs:**
- `channelId` (string): ID of the channel
- `timestamp` (string): Timestamp of the message
- `name` (string): Name of the emoji

### getUserInfo

Get information about a user.

**Inputs:**
- `userId` (string): ID of the user

## License

MIT

## Credits

Based on the original MCP server by the Model Context Protocol team.