What Can It Do?
- Read and send messages to channels and users
- Manage channels by creating, archiving, and updating
- Search your workspace for messages, files, and people
- Handle membership by adding or removing users
Where to Use It
In Agents (Recommended)
Add Slack as a tool to any agent. The agent can then manage your workspace conversationally, choosing the right actions based on context. To add an MCP tool to your agent:- Open your agent’s configuration
- Click Add tools → Connect an app with MCP
- Search for the integration and select it
- Authenticate with your account
In Workflows (Via Agent Node)
For automated pipelines, use an Agent Node with Slack tools. This gives you the flexibility of an agent within a deterministic workflow.As a Custom MCP Node
You can also create a standalone MCP node for a specific action. This generates a reusable node that performs one task, useful when you need the same operation repeatedly in workflows.- Go to your node library and search for the integration
- Click Create a node with AI
- Describe the specific action you want (e.g., “Post a message to #general”)
- Test the node and save it for reuse
Custom MCP nodes are single-purpose by design. For tasks that require multiple steps or dynamic decision-making, use an agent instead.
Available Tools
| Tool | Description |
|---|---|
| Read Messages | Read messages from a channel |
| Send Message | Post a message to a channel or user |
| Send Ephemeral Message | Send a message only visible to one user |
| Create Canvas | Create a rich canvas message |
| Add User To Channel | Add a user to a channel |
| Remove From Channel | Remove a user from a channel |
| Delete Message | Delete a message |
| Get Message Thread | Get a message and replies |
| Search Users | Search for users |
| Create Channel | Create a new channel |
| Archive Channel | Archive a channel |
| Update Channel Topic | Update a channel’s topic |
| List Users In Channel | List channel members |
| Search | Search messages and files |
Example Prompts
Use these with your agent or in the Agent Node: Send a message:Troubleshooting
| Issue | Solution |
|---|---|
| Agent not finding the right data | Use exact channel names with # prefix |
| Action not completing | Check that you’ve authenticated with Slack |
| Unexpected results | The agent may chain multiple tools (e.g., finding a user first, then adding to channel). Review the agent’s reasoning to understand its approach. |
| Tool not available | Verify the tool is enabled in your agent’s MCP configuration |
Need Help?
- Agents documentation for setup and best practices
- Agent Node guide for workflow integration
- Gumloop Community for questions and examples
- Contact [email protected] for assistance
Use this integration directly in Claude or Cursor. Connect remotely via the Slack MCP server using your Gumloop credentials.