Google Calendar MCP Server — Multi-Account Calendar Management for AI Assistants

At a glance: 1,100+ GitHub stars, 13 tools, v2.6.1, multi-account support, OAuth 2.0 with PKCE. Rating: 4/5. The nspady/google-calendar-mcp server is the leading community implementation for Google Calendar MCP integration. There is no official Google Calendar MCP server — Google briefly shipped and removed MCP support from their Workspace CLI in early March 2026. What It Does 13 tools covering the full calendar lifecycle: Read (7 tools): list-calendars, list-events, get-event, search-events, get-freebusy, get-current-time, list-colors Write (5 tools): create-event, create-events (bulk, new in v2.5.0), update-event, delete-event, respond-to-event Admin (1 tool): manage-accounts — add/remove/list connected Google accounts What Sets It Apart Multi-account with cross-calendar conflict detection — connect work + personal accounts, check availability across all calendars simultaneously Intelligent import from images/PDFs — point at a conference poster or invitation, it extracts and creates