Resend Email MCP Server vs Slack MCP Server (korotovsky)

A side-by-side comparison of two Communication servers — tools, transport, auth, maintenance, and copy-paste config for each.

	Resend Email MCP Server Official Resend MCP to compose and send transactional email from your assistant Verified stdio (local) API key TypeScript	Slack MCP Server (korotovsky) Powerful Slack MCP with stdio/SSE/HTTP, DMs, group DMs and no-admin token auth Verified stdio (local) API key Go
Category	Communication	Communication
Language	TypeScript	Go
Transport	stdio (local)	stdio (local)
Auth	API key	API key
GitHub stars	530	1.7k
Last commit	20 days ago	1 month ago
Verified
Actively maintained
Install	`npx -y resend-mcp`	`npx -y slack-mcp-server@latest --transport stdio`
Repo	Open	Open

Verdict

Pick Resend Email MCP Server if you want the official, vendor-maintained server.

Pick Slack MCP Server (korotovsky) if you prefer the more popular, battle-tested option.

Add Resend Email MCP Server

Install / run

npx -y resend-mcp

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "resend-email-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "resend-mcp"
      ],
      "env": {
        "RESEND_API_KEY": "<your-resend-api-key>"
      }
    }
  }
}

Add Slack MCP Server (korotovsky)

Install / run

npx -y slack-mcp-server@latest --transport stdio

Paste into ~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "slack-mcp-server-korotovsky": {
      "command": "npx",
      "args": [
        "-y",
        "slack-mcp-server@latest",
        "--transport",
        "stdio"
      ],
      "env": {
        "SLACK_MCP_XOXP_TOKEN": "<your-slack-user-oauth-token-xoxp>"
      }
    }
  }
}

FAQ

Resend Email MCP Server or Slack MCP Server (korotovsky) — which is better?

Pick Resend Email MCP Server if you want the official, vendor-maintained server. Pick Slack MCP Server (korotovsky) if you prefer the more popular, battle-tested option.

Can I use both Resend Email MCP Server and Slack MCP Server (korotovsky)?

Yes — MCP clients let you enable multiple servers at once. Add both configs to your client's mcpServers and use whichever tool fits the task.

Do Resend Email MCP Server and Slack MCP Server (korotovsky) work with Claude, Cursor and Windsurf?

Both do. Copy the per-client config below into Claude Desktop, Cursor, or Windsurf.

View Resend Email MCP Server →View Slack MCP Server (korotovsky) →More comparisons →