Slack MCP Server

Overview

The Slack MCP server connects Panther AI to your Slack workspace, providing tools to search messages and files, send messages, manage canvases, and look up user profiles.

MCP server URL: https://mcp.slack.com/mcp

Prerequisites

• A Slack workspace

• A Slack app published to the Slack Marketplace or approved as an internal app for your workspace. Unlisted apps are not supported.

• Permission to install apps in your Slack workspace

Setup

The Slack MCP server requires manual OAuth credentials. You will need to add the server in Panther first to obtain the redirect URL, then register an OAuth application in Slack.

1. Add the server in Panther:

   1. In the upper-right corner of your Panther Console, click the gear icon (Settings) > Panther AI.

   2. Navigate to the MCP Servers tab.

   3. Click Add MCP Server.

   4. Select Slack from the catalog.

   5. Enter a Name for the server (e.g., "Slack").

   6. Optionally enter a Description.

   7. Click Next. Panther will attempt to discover the server's OAuth metadata and display a Redirect URL. Copy this URL — you will need it in the next step.

2. Register an OAuth application in Slack:

   1. Go to the Slack App Management page and click Create New App.

   2. Choose From scratch, enter a name (e.g., "Panther AI MCP"), and select your workspace.

   3. In the left sidebar, navigate to OAuth & Permissions.

   4. Under Redirect URLs, click Add New Redirect URL and paste the redirect URL copied from step 1. Click Save URLs.

   5. Under User Token Scopes, add the scopes corresponding to the tools you want to allow:

      • Search tools: search:read.public, search:read.private, search:read.mpim, search:read.im, search:read.files, search:read.users

      • Messaging tools: chat:write, channels:history, groups:history, mpim:history, im:history

      • Canvas tools: canvases:read, canvases:write

      • User tools: users:read, users:read.email

   6. In the left sidebar, navigate to Agents & AI Apps and toggle Model Context Protocol to On.

   7. In the left sidebar, navigate to Basic Information.

   8. Under App Credentials, note the Client ID and Client Secret.

3. Complete the setup in Panther:

   1. Return to the Panther MCP server setup wizard.

   2. Enter the OAuth Client ID and Client Secret from step 2.

   3. Click Create.

Connecting your account

After an admin adds the Slack server:

1. On the MCP Servers page, find Slack in the available servers list.

2. Click Connect.

3. You will be redirected to Slack's OAuth authorization page. Sign in and grant the requested permissions.

4. After authorization, you will be redirected back to Panther to configure your tool permissions.

Learn more

• Slack MCP Server documentation