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Mailbox MCP Review

Mailbox MCP is a secure remote Model Context Protocol (MCP) server that connects existing mailboxes (Gmail, Outlook, IMAP) to AI assistants for email and calendar management.

shipped Sep 15, 2026freemium
Domain rating15
Mailbox MCP — product screenshot

Why it matters

1Offers a freemium model with a Free tier at £0 and a Pro tier at £2.92/month.
2Integrates with Gmail, Microsoft 365, and any IMAP host.
3Provides an API for comprehensive email and calendar management via AI.
4Does not train on user data, ensuring privacy.

About Mailbox MCP

Business Model
Subscription SaaS
Usage Pricing
£0.00 for Free tier, £0.003 for Pro tier (based on billing cycle) per MCP call
Free Credits
5 MCP calls/day
Headquarters
England, UK
Funding
Bootstrapped
Platforms
Web, API
Target Audience
Individuals and teams seeking AI integration for email management.

Pricing Plans

Free
£0 / monthly
  • • 5 MCP calls per mailbox per day
  • • Supports Gmail, Microsoft 365, IMAP
  • • No credit card required
  • • No expiry
Pro
£2.92/mo
  • • Up to 1,000 MCP calls a day
  • • Paid annually at £34.99 + VAT
  • • Stop renewal any time
Team Access
from £10.00/mo
  • • Tiers of 3, 5 or 10 named people
  • • Each person gets their own connection
  • • Activity log for actions

Cost Examples

  • • Free tier: 5 calls allowed
  • • Pro tier: £2.92 for up to 1,000 calls/day

Leadership

Mark McNeeceFounderLinkedIn
API Docs

Specs

API Docs

View Documentation →

API Available

Yes, public API

overview

What is Mailbox MCP?

Mailbox MCP is an AI integration tool developed by Mark McNeece that enables individual users of AI assistants (e.g., Claude, ChatGPT, Cursor, VS Code) to manage their existing email and calendar accounts directly with AI. It functions as a secure remote Model Context Protocol (MCP) server, allowing AI clients to interact with Gmail, Microsoft 365, Outlook, or any IMAP/CalDAV host without data migration or new email address creation. The platform supports a wide range of email actions, including reading, searching, drafting, sending, and filing, and can manage calendar events when integrated. As of September 2026, Mailbox MCP is actively maintained, with its directory listing last verified on September 8, 2026.

features

Key Features of Mailbox MCP

Mailbox MCP provides a robust set of features designed to integrate AI assistants with existing email and calendar infrastructure. The platform ensures secure remote access and maintains the integrity of the user's mailbox.

  • Secure remote MCP server for connecting existing mailboxes to AI.
  • AI-assisted reading and searching of emails, including content within attachments.
  • AI drafting and sending of replies, new emails, and forwards within existing threads.
  • AI-driven filing, archiving, and organization of emails across folders.
  • Calendar integration for AI-assisted meeting booking, free/busy checks, and invitation management.
  • Support for sending emails from any alias associated with the mailbox, with custom display names and signatures.
  • Compatibility with Gmail, Microsoft 365, Outlook, and any IMAP/CalDAV host.
  • Data Processing Addendum (DPA) available at https://mailbox-mcp.com/legal/dpa.
  • API documentation accessible at https://mailbox.bot/mcp-install for developers.

use cases

Who Should Use Mailbox MCP?

Mailbox MCP is primarily designed for individual users and teams who leverage AI assistants (e.g., Claude, ChatGPT, Cursor, VS Code) and require advanced, secure integration with their existing email and calendar systems. Its capabilities address various productivity and organizational needs.

  • Individual AI Assistant Users: For those who want to use AI to manage their personal or professional email inbox, including summarizing, drafting, and organizing messages.
  • Professionals with High Email Volume: To automate email triage, prioritize urgent communications, and streamline responses using AI.
  • Users Requiring AI for Scheduling: Individuals needing AI to book meetings, manage calendar events, and coordinate availability directly from their email interface.
  • Developers and Teams Integrating AI: For those building AI workflows that require programmatic access to email and calendar functions without developing custom connectors for each service.
  • Users Concerned with Data Privacy: Individuals who prioritize that their email data is not used for AI model training, as Mailbox MCP explicitly states it 'never' trains on user data.

how to use

How to Use Mailbox MCP

Mailbox MCP offers a 'no code — paste-an-URL setup' for connecting your email and calendar accounts to AI assistants. The process involves configuring your existing mailbox to interact with the MCP server.

  • 1Navigate to the Mailbox MCP website (https://mailbox-mcp.com/).
  • 2Select your email provider (Gmail, Microsoft 365, or IMAP host) and follow the connection prompts.
  • 3Connect your calendar (Microsoft 365, Google Calendar, or CalDAV) if calendar management is desired.
  • 4Obtain the Model Context Protocol (MCP) URL provided by Mailbox MCP.
  • 5Integrate this MCP URL into your preferred AI assistant (e.g., Claude, ChatGPT, Cursor) according to its documentation.
  • 6Begin using your AI assistant to read, search, draft, send, and manage emails and calendar events.

pricing

Mailbox MCP Pricing & Plans

Mailbox MCP operates on a freemium model, offering a Free tier and paid subscription plans for increased usage and features. Pricing is based on a per-call model for usage beyond free limits.

  • Free Tier: £0 per month, includes 5 MCP calls per day at £0.00 per call.
  • Pro Tier: £2.92 per month (billed annually), includes up to 1,000 MCP calls per day at £0.003 per call.
  • Team Access: Starting from £10.00 per month (billed annually), designed for multiple users with custom usage limits and pricing.

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Pros

  • +Connects to existing Gmail, Microsoft 365, and IMAP mailboxes without requiring a new email address.
  • +Offers comprehensive AI capabilities for email management, including reading, searching, drafting, sending, and organizing.
  • +Integrates calendar functions for AI-assisted meeting booking and event management.
  • +Explicitly states 'never' training on user data, enhancing privacy.
  • +Provides a 'no code — paste-an-URL setup' for ease of integration with AI assistants.
  • +Supports sending from any email alias with custom display names and signatures.

Cons

  • −Does not hold ISO 27001 or SOC 2 certifications, which may be a consideration for some enterprise users.
  • −Support is exclusively via email, with no phone line available.
  • −Usage beyond the free tier incurs per-call costs, which can accumulate with high AI interaction volume.
  • −Specific user reviews and reception data are not extensively detailed in public information.
  • −While comprehensive, it does not offer email marketing or bulk sending capabilities like dedicated ESPs.

Policies

Pricing Page

View Pricing→

Similar Tools

Mailbox MCP vs Competitors

Mailbox MCP distinguishes itself in the AI email integration landscape by focusing on connecting existing personal mailboxes to AI assistants via a secure remote MCP server. This approach differentiates it from various other email-related MCP solutions.

1

Hiver

AI-powered shared inbox for teams, offering email management, automation, and collaboration features similar to Mailbox MCP.

View on Stork→
2

Missive

Business-first email assistant with shared inboxes, team collaboration, and AI features for managing email conversations.

View on Stork→
3

Gmelius

Transforms Gmail into a shared team workspace with AI for email automation, routing, and collaboration.

View on Stork→
4

Tekst

Enterprise AI for shared mailbox management, automating categorization, prioritization, and routing of emails.

Visit→
5

ReplyFabric

AI platform specifically designed for high-volume, high-complexity operational shared mailboxes and automation.

Visit→

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