Is eu.lettio/mcp safe to use?

eu.lettio/mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.

How do I install eu.lettio/mcp?

eu.lettio/mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.

What AI clients work with eu.lettio/mcp?

eu.lettio/mcp is compatible with claude-desktop, cursor, claude-code. It uses http and stdio transport.

Is eu.lettio/mcp actively maintained?

eu.lettio/mcp is actively maintained - last commit was 5 days ago.

eu.lettio/mcp

@lettio/mcp

Private, EU-hosted email for AI agents over JMAP: read, search, reply, draft, organize, send.

GitHub npm

No known CVEs

MIT license

Actively maintained

Last commit 5d ago

Works with most clients

Transport: http, stdio

0 tools

Grade F

MCPpedia last refreshed this data 19h ago

Edit this pageView history

eu.lettio/mcp is an MCP server that private, EU-hosted email for AI agents over JMAP: read, search, reply, draft, organize, send. Its tool list has not been published yet over http and stdio, requires no API key, and scores 61/100 on MCPpedia's security, maintenance and efficiency rubric.

AI / ML Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktophttp, stdio · Node 18+

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

{
  "mcpServers": {
    "lettio": {
      "env": {
        "LETTIO_PASSWORD": "your-app-password",
        "LETTIO_USERNAME": "you@yourcompany.eu"
      },
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

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[![MCPpedia Score](https://mcppedia.org/api/badge/eu-lettio-mcp)](https://mcppedia.org/s/eu-lettio-mcp)

Read me

What eu.lettio/mcp does

Private, EU-hosted email for AI agents over JMAP: read, search, reply, draft, organize, send.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.

npx -y '@lettio/mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

61/100across 5 weighted dimensions

How we score →

0255075100

−39

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @lettio/mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is eu.lettio/mcp safe to use?: eu.lettio/mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.
How do I install eu.lettio/mcp?: eu.lettio/mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with eu.lettio/mcp?: eu.lettio/mcp is compatible with claude-desktop, cursor, claude-code. It uses http and stdio transport.
Is eu.lettio/mcp actively maintained?: eu.lettio/mcp is actively maintained - last commit was 5 days ago.

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Community

Discussion

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AI / ML Communication

Step 1

Install in your client

Config is the same across clients - only the file and path differ.

Supported in Claude Desktophttp, stdio · Node 18+

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

{
  "mcpServers": {
    "lettio": {
      "env": {
        "LETTIO_PASSWORD": "your-app-password",
        "LETTIO_USERNAME": "you@yourcompany.eu"
      },
      "args": [
        "-y",
        "@lettio/mcp"
      ],
      "command": "npx"
    }
  }
}

Are you the author?

Add this badge to your README to show your security score and help users find safe servers.

Embed in your READMEAbout badges →

[![MCPpedia Score](https://mcppedia.org/api/badge/eu-lettio-mcp)](https://mcppedia.org/s/eu-lettio-mcp)

Read me

What eu.lettio/mcp does

Private, EU-hosted email for AI agents over JMAP: read, search, reply, draft, organize, send.

Test This Server

Run this in your terminal to verify the server starts. Then let us know if it worked - your result helps other developers.

npx -y '@lettio/mcp' 2>&1 | head -1 && echo "✓ Server started successfully"

After testing, let us know if it worked:

README

Lettio MCP

Let your AI assistant read, search and send email from a private, EU-hosted mailbox.

Lettio MCP is a Model Context Protocol server that connects an AI agent (Claude, Cursor, and any other MCP client) to a Lettio mailbox over JMAP. Your assistant can triage your inbox, find a message, and send a reply.

🇪🇺 European by default — talks to your own EU-hosted mailbox, no third‑party middleman.
🔒 Safe sending — the server can only ever send as the mailbox it is signed in to. It cannot be tricked into sending from another address.
📬 Everything an agent needs — list, search, read and send, over the open JMAP standard.
👥 One or many mailboxes — configure a single account or several.

Prefer nothing to install? Lettio also runs as a hosted, OAuth‑secured MCP server at https://mcp.lettio.eu/mcp — add that URL in your client and sign in. This npm package is the local / self‑hosted option for people who want to run it on their own machine.

Hosted server: mail cards in Claude

The hosted server at https://mcp.lettio.eu/mcp adds three tools that open interactive cards in clients that support MCP Apps, such as Claude:

show_emails: the inbox, a folder or search results as a list you can open, archive and flag
show_email: a whole conversation, with Reply, Reply all, Archive and Trash
preview_email: a drafted message you can edit, preview in your brand and send

Sending from a card always needs your click, even when the connection doesn't allow the agent to send on its own. One connection can cover up to 10 mailboxes; searches run across all of them.

Tools

Tool	What it does
`whoami`	Show the connected mailbox and whether it may send.
`list_accounts`	List configured mailboxes (local server).
`list_mailboxes`	List folders with message and unread counts.
`list_recent_emails`	Latest messages in a folder, with paging.
`search_emails`	Free text plus filters: sender, recipient, subject, dates, attachments, unread, folder.
`read_email`	One message as text, with its attachments listed. HTML mail is converted.
`get_thread`	A whole conversation, oldest first.
`get_attachment`	Open an attachment: text and PDF as text, images as images, others as binary. Locally it can also save to a file.
`send_email`	Send formatted mail as the signed-in mailbox, with attachments.
`reply_email`	Reply in-thread, optionally to everyone, with attachments.
`create_draft`	Save a message to Drafts without sending.
`create_reply_draft`	Save a threaded reply to Drafts without sending.
`send_draft`	Send a draft that is already in Drafts.
`set_read_status`	Mark messages read or unread.
`flag_email`	Flag or unflag messages.
`label_email`	Add or remove a label.
`move_email`	Move to a folder, `archive`, or `trash` (reversible).
`create_folder`	Create a mail folder.

Messages are written in Markdown and rendered as a styled email: headings, tables, quotes (end with > — Name), callouts (> [!NOTE] Title), code blocks, numbered steps and buttons ([Label](https://url "button")). The mailbox signature is added automatically; set it with set_signature.

To match your brand, set LETTIO_BRANDS to JSON (or a path to a JSON file) keyed by domain:

{ "example.com": { "primary": "#231F47", "accent": "#D8093A", "font": "Lexend, Arial, sans-serif" } }

Formatted mail goes out as HTML with a plain-text version. Pass format: "plain" to send text as written. Bulk tools take up to 100 ids.

Attachments can be base64 content, a local path, or from_email_id with attachment_id to reuse a file from another message.

Requirements

Node.js

... View full README on GitHub

Loading README…

Scored, not listed

Why this score

Five weighted categories - click any category to see the underlying evidence.

Score breakdown

61/100across 5 weighted dimensions

How we score →

0255075100

−39

Security

Maintenance

Efficiency

Documentation

Compatibility

Categoriesclick a row to see evidence

Security

OSV.dev

No known CVEs.

Checked @lettio/mcp against OSV.dev.

Community

Reviews

Be the first to review

Have you used this server?

Share your experience - it helps other developers decide.

How easy was setup?Did it work reliably?How was the documentation?

Frequently Asked Questions

Is eu.lettio/mcp safe to use?: eu.lettio/mcp has no known CVEs as of the latest MCPpedia security scan. It requires authentication to connect, which limits unauthorized access. Licensed under MIT.
How do I install eu.lettio/mcp?: eu.lettio/mcp supports copy-paste install configs on its MCPpedia page for Claude Desktop, Cursor, and Claude Code. Scroll to the Quick Install section and select your client.
What AI clients work with eu.lettio/mcp?: eu.lettio/mcp is compatible with claude-desktop, cursor, claude-code. It uses http and stdio transport.
Is eu.lettio/mcp actively maintained?: eu.lettio/mcp is actively maintained - last commit was 5 days ago.