Klaviyo 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.

	Klaviyo MCP Server Klaviyo's official MCP server: manage campaigns, profiles, flows, events, and reporting from AI clients with an API key. Unverified stdio (local) API key Python	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	Python	Go
Transport	stdio (local)	stdio (local)
Auth	API key	API key
GitHub stars	0	1.7k
Last commit	1 month ago	1 month ago
Verified
Actively maintained
Install	`uvx klaviyo-mcp-server@latest`	`npx -y slack-mcp-server@latest --transport stdio`
Repo	Open	Open

Verdict

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

Pick Slack MCP Server (korotovsky) if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Add Klaviyo MCP Server

Install / run

uvx klaviyo-mcp-server@latest

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

{
  "mcpServers": {
    "klaviyo-mcp-server": {
      "command": "uvx",
      "args": [
        "klaviyo-mcp-server@latest"
      ],
      "env": {
        "PRIVATE_API_KEY": "<your-klaviyo-private-api-key>",
        "READ_ONLY": "false",
        "ALLOW_USER_GENERATED_CONTENT": "false"
      }
    }
  }
}

Requires `uv` (the Python package runner). Install it from https://docs.astral.sh/uv/ if `uvx` is not found.

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

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

Pick Klaviyo MCP Server if you want the official, vendor-maintained server. Pick Slack MCP Server (korotovsky) if you prefer the more popular, battle-tested option, and you want a verified, documented setup.

Can I use both Klaviyo 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 Klaviyo 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 Klaviyo MCP Server →View Slack MCP Server (korotovsky) →More comparisons →