Google Calendar MCP Server

The Google Calendar MCP Server bridges Claude Desktop with the Google Calendar API, turning a natural‑language assistant into a full‑featured calendar manager. By exposing a set of well‑defined tools—, , , and —the server lets developers embed scheduling capabilities directly into conversational workflows without writing custom API integrations.

At its core, the server implements the Model Context Protocol specification, which means it can be discovered and invoked by any MCP‑compatible client. OAuth 2.0 authentication is handled securely, with PKCE‑enabled flows and encrypted token storage, so user credentials never leave the client environment. The server’s design is intentionally lightweight: it uses standard input/output for communication with Claude Desktop, allowing the tool to run as a simple background process on any machine that supports Node.js.

Key capabilities include:

• Event retrieval with rich filtering – accepts time ranges, maximum results, and sorting preferences, enabling assistants to answer queries like “Show me my meetings next week” or “What’s scheduled for tomorrow afternoon?”.
• Full lifecycle event creation and modification – and support all core fields (summary, description, start/end times) plus optional color IDs and recurrence rules. The recent 1.0.5 update adds direct support for recurring events, eliminating the need for post‑creation adjustments.
• Safe deletion – removes events by ID, giving users a straightforward way to clean up schedules.
• Color management – By passing , developers can programmatically style events, making it easier to differentiate types of meetings or priorities within the calendar view.

Real‑world use cases are plentiful. A productivity assistant can schedule a follow‑up meeting after a conversation, automatically adjust the time based on participant availability, and color‑code it for easy visual scanning. A project management bot can pull upcoming milestones from a shared calendar, or an HR chatbot could create recurring training sessions for new hires. Because the server exposes these operations as discrete, typed tools, developers can compose complex workflows—such as “Check my calendar, find a free slot, and book a meeting”—without writing boilerplate API handling code.

What sets this MCP server apart is its seamless integration path. Once authenticated, the tool stays ready to respond to any prompt that requires calendar interaction; no additional context switching or manual API calls are needed. The combination of robust OAuth handling, comprehensive event management, and strict schema validation ensures that developers can trust the tool to behave predictably in production environments. For any team looking to embed Google Calendar functionality into an AI‑driven interface, this server offers a ready‑made, standards‑compliant foundation.