Pyfastmail

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An MCP server that provides AI assistants with full access to Fastmail accounts for managing email, contacts, calendars, and file storage. It implements 42 tool

автор: pjosols

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Описание

An MCP server that provides AI assistants with full access to Fastmail accounts for managing email, contacts, calendars, and file storage. It implements 42 tools across JMAP, CardDAV, CalDAV, and WebDAV protocols to enable comprehensive account interaction through natural language.

README

An MCP server that gives AI assistants full access to your Fastmail account — email, contacts, calendars, and file storage.

⚠️ This server can send email, delete messages, and modify contacts/calendars on your behalf. AI assistants may act on content from untrusted sources (emails, web pages, files) which could contain prompt injection attacks. Review tool calls before approving them, especially actions that send email or delete data.

Features

Domain	Protocol	Tools
Mail	JMAP	Send, reply, forward, search, read, pin, archive, keywords, masked email, attachments, threads, import/export, identities
Contacts	JMAP	List address books, CRUD contacts, query
Calendar	CalDAV	List calendars, CRUD events (optional — requires app password)
Files	WebDAV	List, upload, download, move, delete, create folders (optional — requires app password)

Installation

pip install pyfastmail-mcp

Or run directly with uvx:

uvx pyfastmail-mcp

Configuration

1. Get Fastmail Credentials

You need an API token from Fastmail. An app password is optional (only needed for calendar and file storage).

API Token (required — mail and contacts): Fastmail Settings → Privacy & Security → API Tokens — enable the urn:ietf:params:jmap:contacts capability
App Password (optional — calendars and files): Fastmail Settings → Privacy & Security → App Passwords — create one with the "DAV (CardDAV, CalDAV, WebDAV)" scope

If you only set the API token, the server starts with mail and contacts tools. Calendar and file tools are registered only when the app password is also provided.

2. Set Environment Variables

export FASTMAIL_API_TOKEN="fmu1-..."
export FASTMAIL_APP_PASSWORD="your-app-password"
export FASTMAIL_EMAIL="[email protected]"

3. Add to Your MCP Client

For Claude Desktop, add to claude_desktop_config.json:

{
  "mcpServers": {
    "fastmail": {
      "command": "uvx",
      "args": ["pyfastmail-mcp"],
      "env": {
        "FASTMAIL_API_TOKEN": "fmu1-...",
        "FASTMAIL_APP_PASSWORD": "your-app-password",
        "FASTMAIL_EMAIL": "[email protected]"
      }
    }
  }
}

For Kiro CLI, add to .kiro/settings/mcp.json:

{
  "mcpServers": {
    "fastmail": {
      "command": "uvx",
      "args": ["pyfastmail-mcp"],
      "env": {
        "FASTMAIL_API_TOKEN": "${FASTMAIL_API_TOKEN}",
        "FASTMAIL_EMAIL": "${FASTMAIL_EMAIL}",
        "FASTMAIL_APP_PASSWORD": "${FASTMAIL_APP_PASSWORD}"
      }
    }
  }
}

Tools

Mail (`mail_*`)

Tool	Description
`health_check`	Verify connection and auth
`mail_list_mailboxes`	List all mailboxes (folders/labels)
`mail_create_mailbox`	Create a mailbox
`mail_rename_mailbox`	Rename a mailbox
`mail_delete_mailbox`	Delete a mailbox
`mail_get_email`	Get email by ID (with optional headers)
`mail_get_recent_emails`	Get recent emails
`mail_search_emails`	Search by query
`mail_search_snippets`	Highlighted search result snippets
`mail_get_email_thread`	Get full thread
`mail_mark_email_read`	Mark read/unread
`mail_pin_email`	Pin/unpin (flag/star)
`mail_move_email`	Move to mailbox
`mail_delete_email`	Move to trash or permanently delete
`mail_archive_email`	Archive
`mail_manage_email_labels`	Add/remove keywords
`mail_export_email`	Download raw .eml file
`mail_import_email`	Import .eml into mail store
`mail_parse_email`	Parse a blob as email without importing
`mail_list_identities`	List send-as identities
`mail_set_identity`	Create/update/delete identities
`mail_send_email`	Send new email
`mail_reply_to_email`	Reply to email
`mail_forward_email`	Forward email
`mail_list_masked_emails`	List masked emails
`mail_create_masked_email`	Create masked email
`mail_update_masked_email`	Update masked email state, domain, description, or URL
`mail_download_attachment`	Download attachment
`mail_upload_attachment`	Upload blob for sending

Contacts (`contacts_*`)

Tool	Description
`contacts_list_address_books`	List address books
`contacts_list`	List contacts (query+get combo)
`contacts_get_contact`	Get contact(s) by ID
`contacts_query_contacts`	Query contacts with filters and sorting
`contacts_create_contact`	Create contact
`contacts_update_contact`	Update contact fields
`contacts_delete_contact`	Delete contact(s)

Calendar (`calendar_*`)

Tool	Description
`calendar_list_calendars`	List calendars
`calendar_list_events`	List events
`calendar_get_event`	Get event details
`calendar_create_event`	Create event
`calendar_update_event`	Update event
`calendar_delete_event`	Delete event

Files (`files_*`)

Tool	Description
`files_list`	List files/folders
`files_get`	Download file
`files_upload`	Upload file
`files_create_folder`	Create folder
`files_move`	Move/rename file
`files_delete`	Delete file/folder

Development

git clone https://github.com/pjosols/pyfastmail-mcp.git
cd pyfastmail-mcp
uv sync --group dev
uv run pytest

License

MIT

from github.com/pjosols/pyfastmail-mcp

Установить Pyfastmail в Claude Desktop, Claude Code, Cursor

Рекомендуется · одна команда, все IDE

unyly install pyfastmail-mcp

Ставит в Claude Desktop, Claude Code, Cursor и VS Code — сам разбирается с npx, uvx и сборкой из исходников.

Впервые? Поставь CLI: curl -fsSL https://unyly.org/install | sh

Или настроить вручную

Выполни в терминале:

claude mcp add pyfastmail-mcp -- uvx pyfastmail-mcp

Пошаговые гайды: как установить Pyfastmail

Установить Pyfastmail в Claude Desktop Установить Pyfastmail в Claude Code Установить Pyfastmail в Cursor Установить Pyfastmail в VS Code

FAQ

Pyfastmail MCP бесплатный?

Да, Pyfastmail MCP бесплатный — установка в пару кликов через Unyly без оплаты.

Нужен ли API-ключ для Pyfastmail?

Нет, Pyfastmail работает без API-ключей и переменных окружения.

Pyfastmail — hosted или self-hosted?

Доступен hosted-вариант: Unyly запускает сервер в облаке, локальная установка не обязательна.

Как установить Pyfastmail в Claude Desktop, Claude Code или Cursor?

Открой Pyfastmail на unyly.org, выбери вкладку своего клиента (Claude Desktop, Claude Code, Cursor) и нажми Install — конфиг сгенерируется автоматически, без правки JSON.

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