"Firebase: Google's Backend-as-a-Service Platform" matching MCP servers:

Enables agents to read, create, and modify invitations for calendar events through a deny-by-default broker that validates OAuth bearer tokens and intersects server-owned per-subject, per-calendar grants with token scopes. Access is limited to a narrow, data-minimized calendar surface with idempotent writes and fail-closed authorization, rather than arbitrary service or network execution.

This MCP server enables an AI receptionist to manage field-service bookings end-to-end: checking technician availability from live Outlook calendars, sending asynchronous SMS offers, tracking request status, and creating confirmed Outlook events with ETag-locked concurrency, all without customer sign-in.

Enables voice assistants to find nearby service providers, connect users to live video representatives for natural conversation, and handle appointment booking. It also returns confirmed bookings so the assistant can add them to its calendar.

A production-grade backend that lets LLMs safely operate Gmail, Google Drive, and Calendar through the Model Context Protocol.

A Model Context Protocol (MCP) server that connects to a PostgreSQL database to manage appointment scheduling.

Enables AI assistants to interact with Fastmail services, providing tools for comprehensive email management, contact searching, and calendar event coordination via the JMAP API. It supports advanced features like threaded conversations, attachment handling, and bulk mailbox operations through natural language.

Enables interaction with multiple Google services including Maps, Finance, Flights, Gmail, and Calendar through a unified interface. Provides comprehensive access to geocoding, stock data, flight information, email management, and calendar operations.

Enables AI assistants to interact with Microsoft 365 and Office services through the Microsoft Graph API, providing tools for email, calendar, files, Teams, SharePoint, and more with configurable permissions and output formats.

Enables AI assistants to discover and book local service businesses like barbers, plumbers, and mechanics directly through MCP-compatible tools.

Enables Claude to manage a service business front desk by searching customers, checking real-time availability, creating and canceling appointments without double-booking, and generating revenue reports from actual data.

MCP server for the eRezo API that enables managing professional contacts and events directly from Claude, including listing, creating, updating, and deleting contacts, as well as event registration.

Official local MCP server for Garoon, enabling AI assistants to interact with the Garoon groupware platform through tools like schedule retrieval and user management.

A cross-platform MCP server for managing Apple Reminders, enabling creation, updating, completion, deletion, and listing of reminders with timezone and child-task support.

A read-only MCP server that exposes a published iCalendar feed as calendar-query tools, enabling users to list events, view today/upcoming schedules, search events, and inspect feed info without OAuth or admin consent. Recurring events are expanded into individual occurrences on query.

Enables managing multiple Gmail accounts through a single MCP server, with independent OAuth per account, supporting email read, search, labeling, drafting and sending, as well as calendar and iCal feed operations.

Enables AI agents to interact with the Meridian business-services platform, exposing services, service requests, workflow steps, payments, and meetings as MCP tools and resources.

Enables interaction with Calendly's scheduling platform via MCP, allowing users to manage events, invitees, and schedule meetings directly using the Calendly API.

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.

Lets an MCP client list and manage local purchases, receipts, and confirmed return, refund, or warranty deadlines through eight tools that reuse the same business logic and SQLite data as the web app. It runs over local stdio, so CRUD works without the HTTP backend, though reminder processing still needs it.

A Model Context Protocol server for Google Workspace integration with send-as alias support, email templates, and scheduled send, enabling AI assistants to manage Gmail and Google Calendar through natural language.