"Collaboration Between Multiple AIs via MCP (Master Control Program)" matching MCP servers:

A Model Context Protocol server for managing iCloud Calendar events, supporting multiple alarms and both stdio and Streamable HTTP transports.

Provides Japanese business day calculations: add or subtract business days, count between dates, check whether a date is a business day, and reverse-calculate deadlines. Handles national holidays and year-end periods fully offline with no API keys required.

Gives MCP clients access to Google Workspace (Gmail, Drive, Calendar, Sheets, Docs, etc.) across multiple Google accounts simultaneously.

An MCP server providing comprehensive email capabilities via IMAP and SMTP, enabling AI assistants to read, search, send, manage, schedule, and analyze emails across multiple accounts.

Read-only MCP server to search and read emails and calendar events from a BlueMind account via the BlueMind REST API.

A comprehensive time and calendar utility server that provides timezone conversions, date arithmetic, and business day calculations for AI agents. It features extensive support for the Chinese lunar calendar, including almanac data, festivals, and public holiday tracking across multiple regions.

Enables AI agents to control Thunderbird directly, including mail, folders, contacts, calendar, filters, and settings, through its own internals.

MCP server integrating with When2Work scheduling API, enabling AI assistants to query employee schedules, shifts, time off, and reports via a set of tools.

MCP server for the Indico meeting agenda system, enabling AI agents to search event categories, browse agendas, and extract contribution and session details. Works with multiple Indico instances simultaneously.

Enables natural language interaction with multiple Google accounts (Gmail, Drive, Calendar) from MCP-compatible clients like Claude.

An MCP App that renders an interactive dashboard in Claude conversations to unify calendar events, emails, and documents into a single interface. It enables users to manage their daily schedule and perform actions like meeting preparation through bidirectional communication between the UI and the model.

Enables full read/write control over Apple Mail.app and Calendar.app on macOS, exposing all configured accounts without per-provider setup.

An MCP server that gives Claude Code and Codex full control of a personal Outlook.com mailbox and calendar via the Microsoft Graph API, enabling mail, draft, folder, and calendar operations through natural language.

Gives Claude Code access to Outlook Mail, Calendar, and Contacts via Microsoft Graph, with safety-first defaults (no sending, no hard deletes, every mutation logged). Supports multiple Microsoft accounts through a PKCE OAuth flow.

Enables AI assistants to load, query, and manage iCalendar files with full CRUD operations and support for multiple calendars.

A reliable, cross-platform MCP server for Apple iCloud Calendar that provides guarded CalDAV CRUD operations, idempotent writes, ETag concurrency control, and recurrence expansion via stdio or HTTP.

Enables multi-account Gmail and Google Calendar access through MCP, allowing operations across multiple Google accounts with a single tool call.

MCP server for interacting with Google Gmail and Calendar via natural language, supporting multiple accounts.

An MCP server that integrates with the OpenClaw API to enable AI assistants to send messages across multiple platforms, execute system commands, and manage calendar events and emails.

Enables natural language control over Google Workspace services including Gmail, Calendar, Drive, Docs, Sheets, Slides, Forms, Tasks, Chat, Contacts, Apps Script, and Custom Search via a remote MCP server hosted on Google Cloud Run.