Lettio MCP Server

by lettio-eueu.lettio/mcpv0.1.2

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Active24d ago

Install Lettio MCP server

claude mcp add lettio -e LETTIO_USERNAME='<lettio-username>' -e LETTIO_PASSWORD='<lettio-password>' -- npx -y @lettio/mcp

{
  "mcpServers": {
    "lettio": {
      "command": "npx",
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "env": {
        "LETTIO_USERNAME": "<lettio-username>",
        "LETTIO_PASSWORD": "<lettio-password>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "lettio": {
      "command": "npx",
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "env": {
        "LETTIO_USERNAME": "<lettio-username>",
        "LETTIO_PASSWORD": "<lettio-password>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "lettio": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "env": {
        "LETTIO_USERNAME": "<lettio-username>",
        "LETTIO_PASSWORD": "<lettio-password>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "lettio": {
      "command": "npx",
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "env": {
        "LETTIO_USERNAME": "<lettio-username>",
        "LETTIO_PASSWORD": "<lettio-password>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
LETTIO_USERNAME	yes	—	Full email address of the Lettio mailbox, e.g. you@yourcompany.eu.
LETTIO_PASSWORD	yes	yes	App password for the mailbox.
LETTIO_HOST	—	—	Mail host. Defaults to https://mail.lettio.eu.

Remote endpoints

streamable-httphttps://mcp.lettio.eu/mcp

Freshness

Active — last maintenance signal 24d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-09-15 · 24d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-09-15 · 24d ago · official registry · v0.1.2

FAQ

›How do I install the Lettio MCP server in Claude Code?

Run: claude mcp add lettio -e LETTIO_USERNAME='<lettio-username>' -e LETTIO_PASSWORD='<lettio-password>' -- npx -y @lettio/mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Lettio require an API key?

Yes. It expects LETTIO_USERNAME, LETTIO_PASSWORD, of which 1 is a secret.

›Can I use Lettio as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Lettio in the official MCP registry?

Yes, as eu.lettio/mcp.