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MCP Server Directory

Slack MCP Server — MCP Server Profile

Complete MCP server audit for Slack MCP Server by Anthropic. Security score 81/100, permissions: channels:read, channels:history, chat:write, users:read, groups:read (private channels), risk level: Medium.

Connects AI agents to Slack workspaces for reading messages, posting updates, and managing channels. Requires careful scope management to prevent data exposure.

Security Rating 81 / 100
Vendor Type Official (Anthropic)
Risk Category Medium Risk

Exposed Tools & Function Calls

  • slack_list_channels
  • slack_post_message
  • slack_reply_to_thread
  • slack_add_reaction
  • slack_get_channel_history
  • slack_get_thread_replies
  • slack_get_users
  • slack_get_user_profile

Required Permission Scopes

  • channels:read
  • channels:history
  • chat:write
  • users:read
  • groups:read (private channels)

Vulnerability & Risk Analysis

Private channel data exposure (High)

If groups:read and groups:history scopes are granted, agents can read all private channel conversations, exposing sensitive business discussions.

Fix: Grant access only to specific channels using channel-level permissions where possible. Audit all channels an agent can read.
Message impersonation (Medium)

Agents posting as a bot may be mistaken for human employees, enabling social engineering attacks if an agent is compromised.

Fix: Clearly label all bot messages. Add a [AI-Generated] prefix to all agent posts. Never allow agents to impersonate named users.