slack-mcp-server
@ubie-oss
About slack-mcp-server
A Slack MCP server
Config
Add this server to your MCP-compatible client using the configuration below.
{
"mcpServers": {
"slack-mcp-server-ubie-oss": {
"command": "npx",
"args": [
"@ubie-oss/slack-mcp-server"
]
}
}
}Tools
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Fetch the live tool list by running this server in a temporary sandbox using the button above.
Overview
What is slack-mcp-server?
An MCP (Model Context Protocol) server that provides a standardized interface for AI assistants to interact with the Slack API. It allows reading and writing Slack data through configurable bot and user tokens.
How to use slack-mcp-server?
Install via npm install @ubie-oss/slack-mcp-server, set environment variables SLACK_BOT_TOKEN and SLACK_USER_TOKEN (and optionally SLACK_SAFE_SEARCH), then run with npx @ubie-oss/slack-mcp-server (default stdio) or with -port 3000 for Streamable HTTP. Configure clients with the provided JSON block.
Key features of slack-mcp-server?
- List public channels with pagination
- Post messages and reply to threads
- Add emoji reactions to messages
- Retrieve channel history and thread replies
- Search messages with powerful filters
- Get user profiles in bulk
Use cases of slack-mcp-server?
- Automate sending notifications or updates to Slack channels
- Search workspace messages using date, user, and content filters
- Manage thread discussions by posting replies and reading history
- Fetch user profile information in batch for AI-driven workflows
- Enable AI assistants to interact with Slack via MCP-compatible clients
FAQ from slack-mcp-server
What tokens are required?
SLACK_BOT_TOKEN (bot user OAuth token) is required for most operations. SLACK_USER_TOKEN (user OAuth token) is needed for features like message search.
What does SLACK_SAFE_SEARCH do?
When set to true, it automatically excludes private channels, DMs, and group DMs from search results. This is enforced server-side and cannot be overridden by clients.
What transports are supported?
Stdio transport (default for local integration) and Streamable HTTP transport (specify with -port 3000 for web applications). The HTTP endpoint is http://localhost:3000/mcp.
Where is this package hosted and how do I authenticate?
The package is hosted on GitHub Registry.
Frequently asked questions
What tokens are required?
`SLACK_BOT_TOKEN` (bot user OAuth token) is required for most operations. `SLACK_USER_TOKEN` (user OAuth token) is needed for features like message search.
What does `SLACK_SAFE_SEARCH` do?
When set to `true`, it automatically excludes private channels, DMs, and group DMs from search results. This is enforced server-side and cannot be overridden by clients.
What transports are supported?
Stdio transport (default for local integration) and Streamable HTTP transport (specify with `-port 3000` for web applications). The HTTP endpoint is `http://localhost:3000/mcp`.
Where is this package hosted and how do I authenticate?
The package is hosted on GitHub Registry.
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