@Cloud9 Labs/ Slack
FreeNot checkedMCP server for Slack API integration with 14 tools for messaging and channel management, including sending messages, managing channels, searching messages, and
About
MCP server for Slack API integration with 14 tools for messaging and channel management, including sending messages, managing channels, searching messages, and file uploads.
README
MCP server for Slack API integration - 14 messaging and channel management tools.
Installation
{
"mcpServers": {
"slack": {
"command": "npx",
"args": ["-y", "@cloud9-labs/mcp-slack"],
"env": {
"SLACK_BOT_TOKEN": "xoxb-your-bot-token"
}
}
}
}
Tools
| Tool | Description |
|---|---|
| slack_post_message | Send a message to a Slack channel |
| slack_update_message | Edit an existing message |
| slack_delete_message | Delete a message from a channel |
| slack_list_channels | List all channels in the workspace |
| slack_get_channel_info | Get detailed information about a channel |
| slack_get_channel_history | Retrieve message history from a channel |
| slack_get_replies | Get threaded replies for a message |
| slack_join_channel | Join a Slack channel |
| slack_list_users | List all users in the workspace |
| slack_get_user_info | Get user profile information |
| slack_add_reaction | Add emoji reaction to a message |
| slack_remove_reaction | Remove emoji reaction from a message |
| slack_search_messages | Search messages across channels |
| slack_upload_file | Upload files to Slack |
Configuration
Set your Slack bot token as an environment variable:
export SLACK_BOT_TOKEN="xoxb-..."
To create a Slack bot:
- Go to https://api.slack.com/apps
- Create a new app
- Enable Bot User OAuth Token
- Grant required scopes (messages:write, channels:read, users:read, etc.)
- Copy the Bot User OAuth Token
License
MIT
Installing @Cloud9 Labs/ Slack
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/cloud9-labs/mcp-slackFAQ
Is @Cloud9 Labs/ Slack MCP free?
Yes, @Cloud9 Labs/ Slack MCP is free — one-click install via Unyly at no cost.
Does @Cloud9 Labs/ Slack need an API key?
No, @Cloud9 Labs/ Slack runs without API keys or environment variables.
Is @Cloud9 Labs/ Slack hosted or self-hosted?
A hosted option is available: Unyly runs the server in the cloud, no local setup required.
How do I install @Cloud9 Labs/ Slack in Claude Desktop, Claude Code or Cursor?
Open @Cloud9 Labs/ Slack on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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