fastmail-mcp

An MCP (Model Context Protocol) server for Fastmail that provides access to email, contacts, and calendars via the JMAP protocol.

Tools

Email

Tool	Description
`list_mailboxes`	List all mailboxes in the account
`list_emails`	List emails from a mailbox
`get_email`	Get a specific email by ID
`get_recent_emails`	Get the most recent emails from inbox
`search_emails`	Search emails by subject or content
`advanced_search`	Advanced email search with multiple criteria (sender, recipient, date range, attachments, etc.)
`send_email`	Send an email
`reply_email`	Reply to an email with proper threading headers
`save_draft`	Save an email as a draft with optional threading support
`create_draft`	Create an email draft without sending
`mark_email_read`	Mark an email as read or unread
`delete_email`	Delete an email (move to trash)
`move_email`	Move an email to a different mailbox
`add_labels`	Add labels (mailboxes) to an email
`remove_labels`	Remove labels (mailboxes) from an email
`get_email_attachments`	List attachments for an email
`download_attachment`	Download an email attachment (save to disk or get URL)
`get_thread`	Get all emails in a conversation thread
`get_mailbox_stats`	Get mailbox statistics (unread count, total, etc.)
`get_account_summary`	Get overall account summary with statistics

Bulk Operations

Tool	Description
`bulk_mark_read`	Mark multiple emails as read/unread
`bulk_move`	Move multiple emails to a mailbox
`bulk_delete`	Delete multiple emails (move to trash)
`bulk_add_labels`	Add labels to multiple emails
`bulk_remove_labels`	Remove labels from multiple emails

Contacts

Tool	Description
`list_contacts`	List contacts from the address book
`get_contact`	Get a specific contact by ID
`search_contacts`	Search contacts by name or email

Calendars

Tool	Description
`list_calendars`	List all calendars
`list_calendar_events`	List events from a calendar
`get_calendar_event`	Get a specific calendar event by ID
`create_calendar_event`	Create a new calendar event

Utility

Tool	Description
`list_identities`	List sending identities (email addresses)
`check_function_availability`	Check which functions are available based on account permissions
`test_bulk_operations`	Test bulk operations with a dry-run mode

Environment Variables

Variable	Required	Description
`FASTMAIL_API_TOKEN`	Yes	Fastmail API token (create one here)

Setup

npm ci

Usage

Stdio mode (for Claude Desktop, Claude Code, etc.)

node dist/index.js

HTTP mode (with mcp-proxy)

npx mcp-proxy --port 8003 -- node dist/index.js

Claude Desktop configuration

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "fastmail": {
      "command": "node",
      "args": ["/path/to/fastmail-mcp/dist/index.js"],
      "env": {
        "FASTMAIL_API_TOKEN": "your-api-token"
      }
    }
  }
}

License

MIT

fastmail-mcp

fastmail-mcp

Tools

Email

Bulk Operations

Contacts

Calendars

Utility

Environment Variables

Setup

Usage

Stdio mode (for Claude Desktop, Claude Code, etc.)

HTTP mode (with mcp-proxy)

Claude Desktop configuration

License

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