stalwart-mail-mcp

A community MCP server enabling AI agents to interact with a self-hosted Stalwart Mail server via JMAP. It supports searching and reading emails, handling attachments with OCR capabilities, sending messages, managing drafts, and managing contacts. It operates over stdio and requires no server-side installation, relying instead on the user's mailbox credentials.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by cybersmurf

Vendor documentation

What you can do with it

Search and read emails with OCR for scanned attachments
Send emails or create drafts in a thread
Manage contacts and address books

Source and maintenance

Community listingRegistry 2.3.0

mcp-registry: io.github.cybersmurf/stalwart-mail-mcp@2.3.0 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

stalwart-mail-mcp 2.3.0

npm

stalwart-mail-mcp package definition

{
  "version": "2.3.0",
  "transport": "stdio",
  "identifier": "stalwart-mail-mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "STALWART_URL",
      "format": "string",
      "isRequired": true,
      "description": "Public address of the Stalwart server, e.g. https://mail.example.com"
    },
    {
      "name": "STALWART_USER",
      "format": "string",
      "isRequired": true,
      "description": "Mailbox e-mail address to sign in with"
    },
    {
      "name": "STALWART_PASSWORD",
      "format": "string",
      "isRequired": true,
      "description": "Mailbox or app password"
    },
    {
      "name": "MAIL_LANG",
      "format": "string",
      "description": "Language: auto, en, cs, de, es, fr, it, nl, pl, pt, sk"
    },
    {
      "name": "MAIL_OCR_PROVIDER",
      "format": "string",
      "description": "OCR of scans: auto, off, mistral, anthropic, openai, openrouter, gemini, ollama, lmstudio, custom"
    },
    {
      "name": "MAIL_OCR_API_KEY",
      "format": "string",
      "description": "API key of the OCR provider (not needed for local servers)"
    },
    {
      "name": "MAIL_OCR_MODEL",
      "format": "string",
      "description": "OCR model name"
    },
    {
      "name": "MAIL_OCR_BASE_URL",
      "format": "string",
      "description": "Address of a custom OpenAI-compatible OCR server"
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "stalwart-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stalwart-mail-mcp@2.3.0"
      ],
      "env": {
        "STALWART_URL": "<YOUR_STALWART_URL>",
        "STALWART_USER": "<YOUR_STALWART_USER>",
        "STALWART_PASSWORD": "<YOUR_STALWART_PASSWORD>",
        "MAIL_LANG": "<YOUR_MAIL_LANG>",
        "MAIL_OCR_PROVIDER": "<YOUR_MAIL_OCR_PROVIDER>",
        "MAIL_OCR_API_KEY": "<YOUR_MAIL_OCR_API_KEY>",
        "MAIL_OCR_MODEL": "<YOUR_MAIL_OCR_MODEL>",
        "MAIL_OCR_BASE_URL": "<YOUR_MAIL_OCR_BASE_URL>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "stalwart-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stalwart-mail-mcp@2.3.0"
      ],
      "env": {
        "STALWART_URL": "<YOUR_STALWART_URL>",
        "STALWART_USER": "<YOUR_STALWART_USER>",
        "STALWART_PASSWORD": "<YOUR_STALWART_PASSWORD>",
        "MAIL_LANG": "<YOUR_MAIL_LANG>",
        "MAIL_OCR_PROVIDER": "<YOUR_MAIL_OCR_PROVIDER>",
        "MAIL_OCR_API_KEY": "<YOUR_MAIL_OCR_API_KEY>",
        "MAIL_OCR_MODEL": "<YOUR_MAIL_OCR_MODEL>",
        "MAIL_OCR_BASE_URL": "<YOUR_MAIL_OCR_BASE_URL>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "stalwart-mail-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "stalwart-mail-mcp@2.3.0"
      ],
      "env": {
        "STALWART_URL": "<YOUR_STALWART_URL>",
        "STALWART_USER": "<YOUR_STALWART_USER>",
        "STALWART_PASSWORD": "<YOUR_STALWART_PASSWORD>",
        "MAIL_LANG": "<YOUR_MAIL_LANG>",
        "MAIL_OCR_PROVIDER": "<YOUR_MAIL_OCR_PROVIDER>",
        "MAIL_OCR_API_KEY": "<YOUR_MAIL_OCR_API_KEY>",
        "MAIL_OCR_MODEL": "<YOUR_MAIL_OCR_MODEL>",
        "MAIL_OCR_BASE_URL": "<YOUR_MAIL_OCR_BASE_URL>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "stalwart-mail-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stalwart-mail-mcp@2.3.0"
      ],
      "env": {
        "STALWART_URL": "<YOUR_STALWART_URL>",
        "STALWART_USER": "<YOUR_STALWART_USER>",
        "STALWART_PASSWORD": "<YOUR_STALWART_PASSWORD>",
        "MAIL_LANG": "<YOUR_MAIL_LANG>",
        "MAIL_OCR_PROVIDER": "<YOUR_MAIL_OCR_PROVIDER>",
        "MAIL_OCR_API_KEY": "<YOUR_MAIL_OCR_API_KEY>",
        "MAIL_OCR_MODEL": "<YOUR_MAIL_OCR_MODEL>",
        "MAIL_OCR_BASE_URL": "<YOUR_MAIL_OCR_BASE_URL>"
      }
    }
  }
}

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