Fastmail

Communication · by Fastmail · Verified

Connector An MCP server for Fastmail customers and accounts

Install

In Claude, open Settings, then Connectors.
Find Fastmail in the directory, or choose Add custom connector and paste the URL below.
Sign in to Fastmail and review what it asks to reach.

Connector URL

https://api.fastmail.com/mcp

Claude Code

claude mcp add --transport http fastmail https://api.fastmail.com/mcp

Run in a terminal, then run /mcp in Claude Code to sign in.

Add in Claude Open on claude.com

About

MCP is an open standard, not tied to any one AI provider, for how AI clients talk to external data and tools. Think of it as another API sitting alongside IMAP, CalDAV, and CardDAV, except instead of being designed for mail apps or calendar clients, it’s designed for AI models to use directly.

If you point Claude at our MCP server, you can ask it things like “what’s on my calendar tomorrow?”, “draft a reply to Sarah’s email about the Q3 budget”, or “find my dentist’s address in my contacts” and it will do them against your real Fastmail account.

Tools

add_to_note
archive_email
compose_event
create_contact
create_event
create_note
delete_contact
delete_email
delete_event
delete_note
draft_email
list_calendars
list_folders
list_identities
read_email
read_note
read_thread
rsvp_event
search_contacts
search_email
search_events
search_notes
search_org_contacts
set_memo

24 of 29 tools. claude.com lists the rest. The maker decides what the tools do and can change them. Add connectors only from makers you trust.

From the maker

Facts

Kind: Connector
Category: Communication
Made by: Fastmail
Runs: Remote server
Works in: Claude, Claude API, Claude Code, Claude Desktop
Sign-in: Required
Interactive UI: Yes
Added: 2026-07-21
Source: Verified