google-calendar-mcp and mcp-google-calendar
These are competitors offering functionally equivalent Google Calendar MCP server implementations, with the first being more mature and battle-tested (1,059 stars vs. 9 stars) while the second appears to be a newer alternative implementation.
About google-calendar-mcp
nspady/google-calendar-mcp
MCP integration for Google Calendar to manage events.
Enables multi-account and multi-calendar event management with cross-account conflict detection, recurring event modifications, and intelligent import from images/PDFs via natural language understanding. Implements an MCP server that communicates with Claude Desktop through stdio transport, supporting OAuth 2.0 authentication with automatic token refresh and account switching. Deployable via npx, local installation, or Docker with optional HTTP transport for browser-based account management.
About mcp-google-calendar
guinacio/mcp-google-calendar
A MCP server that allows Claude and other MCP clients to interact with Google Calendar. This server enables AI assistants to manage your calendar events, check availability, and handle scheduling tasks.
Implements dual transport modes (STDIO for Claude Desktop and SSE for web clients) with automatic OAuth 2.0 authentication flow and token persistence. The server provides comprehensive calendar operations including conflict detection, timezone-aware event scheduling with recurring RRULE support, and multi-user availability checking across calendars. Built on Python 3.12+ with Pydantic schemas and integrates directly with Google Calendar API through the Model Context Protocol framework.
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