Slack

No longer maintained. This Runlayer-built connector is deprecated and will not receive further updates. Use Slack (Official), Slack’s official hosted MCP server, instead.

Connect your AI assistant to Slack for messaging, channel management, and workspace search. Uses Slack OAuth for authentication.

Available Tools

Tool	Description
`search`	Search messages across channels with Slack search modifiers
`list_channels`	List all channels in the workspace
`get_channel`	Get details about a specific channel
`get_channel_history`	Get recent messages from a channel
`get_conversation_members`	List members in a channel or conversation
`send_message`	Send messages to channels or DMs with Block Kit support
`fetch`	Fetch a specific message by channel and timestamp
`list_users`	List all users in the workspace
`get_profile`	Get user profile information
`get_thread_messages`	Get all messages in a thread
`get_reactions`	Get emoji reactions on a message
`add_reaction`	Add an emoji reaction to a message
`list_usergroups`	List all user groups
`get_usergroup_members`	Get members of a user group
`get_team_info`	Get workspace/team information

Setup

Create Slack App from Manifest

Go to Slack API: Applications
Click Create New App > From a manifest
Select your workspace and click Next
Paste this manifest (replace <your-tenant> with your Runlayer subdomain):

display_information:
  name: Slack MCP
  description: MCPs by Runlayer
  background_color: "#2c2d30"
oauth_config:
  redirect_urls:
    - https://<your-tenant>.runlayer.com/oauth/callback/
  scopes:
    user:
      - channels:history
      - channels:read
      - users:read
      - users:read.email
      - search:read
      - team:read
      - usergroups:read
      - reactions:read
      - reactions:write
      - chat:write
      - groups:read
      - groups:history
      - im:history
      - im:read
      - mpim:read
      - mpim:history
settings:
  org_deploy_enabled: false
  socket_mode_enabled: false
  token_rotation_enabled: false

Click Next, review the summary, then click Create

Install App to Workspace

Go to Settings > Install App in the sidebar
Click Install to Workspace and authorize the app

Get Credentials

Go to Basic Information in the app settings
Copy the Client ID and Client Secret

Add Server in Runlayer

In Runlayer, go to My connectors, find Slack, and click Add connector
Check Custom OAuth credentials
Enter your Client ID and Client Secret
Click Deploy Server

Authorize

Click Connect on the server page
Select your workspace and click Allow

Troubleshooting

Redirect URI mismatch

Verify the redirect URL matches exactly: https://<your-tenant>.runlayer.com/oauth/callback/ (include trailing slash).

Missing scopes error

Add the missing scope in Slack’s OAuth & Permissions, then revoke and reconnect in Runlayer.

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​Available Tools

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Available Tools

Setup

Troubleshooting