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How to add the Slack MCP server to Cursor

Server URL: https://mcp.slack.com/mcp
Sign-in: OAuth needs your own pre-registered app (no dynamic client registration).
Our hands-on result: Works 7 of 7 tasks passed, tested Oct 16, 2026 with MCP Inspector (reference client).

Cursor setup

File: ~/.cursor/mcp.json (or .cursor/mcp.json in a project)

{
  "mcpServers": {
    "slack": {
      "url": "https://mcp.slack.com/mcp"
    }
  }
}
  1. Cursor relies on dynamic client registration for OAuth. With a server that does not offer it, expect the "does not support dynamic client registration" error. See the fix page linked below.

We ran the hands-on test in a reference client, not in Cursor. This config follows Cursor's documented format for remote (Streamable HTTP) servers. If it fails for you, tell us and we will retest.

Known problems and fixes

Same server, other clients

Full Slack test report | Compare all tested connectors | Connector Weather

How to add the Slack MCP server to Cursor (tested Oct 16, 2026)