"Search for free open-source software" matching MCP servers:

Enables AI assistants to book meetings, check availability, and manage Cal.com scheduling through natural conversation.

Enables AI agents to browse, search, and book meeting rooms across multiple buildings with realistic seed data and conflict detection.

Empowers AI assistants with real-world capabilities including note management, Gmail integration, Google Calendar and Tasks management, and Git repository operations through the Model Context Protocol.

Enables agents to discover events, purchase tickets, and set reminders through MCP tools.

Dingtalk MCP Server

A hosted MCP server that allows AI assistants to access Google Calendar and Sheets via OAuth proxy, requiring no Google Cloud setup.

Enables AI assistants to interact with Apple Notes, Reminders, and Calendar on macOS through MCP, all locally without API keys.

MCP server giving Claude access to Tuta mail, calendar, contacts and drive. Supports mail modes (dedicated/shared/folder), trusted sender filtering with E2E verification, and Docker-based setup.

Enables AI assistants to manage GoHighLevel CRM data including contacts, conversations, opportunities, calendars, and forms through MCP tools and resources.

A Model Context Protocol (MCP) server for interacting with Microsoft 365 and Microsoft Office services through the Graph API.

A macOS-only MCP server that lets Claude read and create events in Apple Calendar, list calendars, and find free time using EventKit.

Provides real, official public holiday data for ~100 countries with tools to list holidays for a year and check if a specific date is a holiday. Free, no API key required, powered by Nager.Date.

An MCP server for Apple iCloud Calendar over CalDAV, supporting list, search, create, update, delete, RSVP, and free-time finding without local macOS dependencies.

MCP server for Apple Calendar and CalDAV providers. Enables listing, creating, updating, deleting events, and checking free/busy status with per-calendar write protection.

Enables full CRUD operations on calendar events, free/busy queries, and availability slot finding via CalDAV, supporting Nextcloud, Radicale, iCloud, and other RFC 4791-compliant servers.

Your real mailbox and calendar for your AI agent — Microsoft 365 via Graph or any IMAP — as 24 tools: read, search, attachments as text, sender history, drafting from identity and knowledge files, free-slot computation. Send, reply, delete and calendar writes need out-of-band human approval: the agent cannot approve its own actions.

Free, keyless MCP server for timezone conversion, world clock, DST-aware date arithmetic, and cross-timezone meeting scheduling using IANA timezones.

Enables MCP clients to interact with CalDAV calendars, letting users view schedules, find free time, create and update events, manage tasks and dated notes, and respond to invitations on their own server.

MCP server that lets you talk to your GoHighLevel sub-account in plain English, offering six tools to search contacts, list calendars, check free slots, and book appointments with dry-run safety and explicit error messages.

The Outlook Calendar MCP enables Claude to directly manage Microsoft Outlook calendars on Windows systems, offering a privacy-focused solution that keeps all data local. Users can view events, create meetings, find free time slots, and manage multiple calendars without their data leaving their machi