MCP Google Calendar Server

v1.0.0

Community

MCPcalendarschedulingmcpmodel-context-protocol
78
Strong
About This MCP

Community-maintained MCP server for Google Calendar integration. Enables AI models to create, read, update, and delete calendar events, manage attendees, set reminders, and query availability. Essential for AI-powered scheduling, meeting coordination, and calendar automation workflows.

Last Evaluated: November 9, 2025
Official Website

Trust Vector Analysis

Dimension Breakdown

🚀Performance & Reliability
+
event operation reliability

Operation success rate testing

Evidence
Google Calendar API — Highly reliable event CRUD operations
highVerified: 2025-11-09
availability search accuracy

Availability accuracy testing

Evidence
Calendar Freebusy API — Accurate availability and free/busy time calculations
highVerified: 2025-11-09
sync reliability

Sync reliability testing

Evidence
Calendar Sync — Reliable event synchronization with incremental sync support
mediumVerified: 2025-11-09
recurring event handling

Recurrence pattern testing

Evidence
Recurring Events — Accurate handling of recurring events and exceptions
highVerified: 2025-11-09
error recovery

Error handling testing

Evidence
Implementation Review — Handles API errors with retry and conflict resolution
mediumVerified: 2025-11-09
🛡️Security
+
authentication security

Authentication mechanism review

Evidence
Google OAuth 2.0 — Uses OAuth 2.0 with scoped calendar access
highVerified: 2025-11-09
token exposure risk

Token security analysis

Evidence
MCP Security Model — OAuth tokens stored locally; AI can perform calendar operations
highVerified: 2025-11-09
event modification risk

Operation authorization testing

Evidence
Security Analysis — AI can create, modify, and delete calendar events
highVerified: 2025-11-09
attendee invitation risk

Invitation risk assessment

Evidence
Calendar Events API — Can send meeting invitations to arbitrary attendees
highVerified: 2025-11-09
calendar sharing control

ACL enforcement testing

Evidence
Calendar ACL — Respects calendar sharing permissions
mediumVerified: 2025-11-09
audit logging

Audit logging review

Evidence
Google Workspace Audit — Calendar operations logged in Google Workspace audit logs
mediumVerified: 2025-11-09
🔒Privacy & Compliance
+
event details exposure

Data flow analysis

Evidence
MCP Data Flow — Event titles, descriptions, locations, and attendees sent to LLM
highVerified: 2025-11-09
attendee privacy

Attendee privacy assessment

Evidence
Privacy Analysis — Attendee email addresses and names exposed
highVerified: 2025-11-09
schedule pattern exposure

Pattern privacy assessment

Evidence
Privacy Analysis — Calendar patterns may reveal personal routines and habits
mediumVerified: 2025-11-09
third party data sharing

Data sharing analysis

Evidence
LLM Provider Policies — Calendar data shared with LLM provider per their privacy policy
highVerified: 2025-11-09
location privacy

Location privacy assessment

Evidence
Calendar Events — Event locations and conference links may be exposed
mediumVerified: 2025-11-09
👁️Trust & Transparency
+
documentation quality

Documentation completeness review

Evidence
Calendar MCP Docs — Good documentation but community-maintained
mediumVerified: 2025-11-09
operation visibility

Logging and traceability assessment

Evidence
MCP Protocol — All calendar operations logged in MCP transaction logs
highVerified: 2025-11-09
open source transparency

Source code review

Evidence
GitHub Repository — Open source community implementation
highVerified: 2025-11-09
privacy risk disclosure

Privacy disclosure review

Evidence
Security Documentation — Limited privacy risk warnings for calendar data
mediumVerified: 2025-11-09
⚙️Operational Excellence
+
ease of setup

Setup complexity assessment

Evidence
Setup Documentation — Requires Google Cloud project setup and OAuth consent
mediumVerified: 2025-11-09
api performance

Performance benchmarking

Evidence
Calendar API Performance — Fast operations for most calendar queries (typically 50-300ms)
highVerified: 2025-11-09
reliability

Reliability analysis

Evidence
Google Calendar API Stability — Built on reliable Google Calendar API with high uptime
highVerified: 2025-11-09
operation coverage

Feature coverage assessment

Evidence
Calendar MCP Server — Covers events, availability, reminders, and attendee management
highVerified: 2025-11-09
community support

Community support assessment

Evidence
GitHub Community — Community-maintained with moderate activity
mediumVerified: 2025-11-09
Strengths
  • +Comprehensive calendar operations (events, availability, reminders)
  • +Built on reliable Google Calendar API with high uptime
  • +Accurate availability and free/busy time calculations
  • +OAuth 2.0 authentication with granular scope controls
  • +Open source community implementation
  • +Excellent for scheduling automation and meeting coordination
Limitations
  • !Event details including titles, locations, and attendees exposed to LLM
  • !AI can create, modify, and delete calendar events
  • !Can send meeting invitations to arbitrary attendees
  • !Calendar patterns may reveal personal routines and habits
  • !Requires Google Cloud project and OAuth configuration
  • !Attendee email addresses and names exposed
Metadata
license: MIT
supported platforms
0: All platforms with Node.js/Python
programming languages
0: TypeScript
1: Python
mcp version: 1.0
github repo: https://github.com/modelcontextprotocol/servers
api dependency: Google Calendar API, Google APIs Client Library
authentication: OAuth 2.0 with Google
first release: 2024-11
maintained by: Community

Use Case Ratings

code generation

Useful for calendar integration code generation

customer support

Excellent for appointment scheduling and meeting coordination

content creation

Useful for content calendar management and publication scheduling

data analysis

Good for analyzing meeting patterns and time utilization

research assistant

Useful for research event tracking and deadline management

legal compliance

Risk of exposing confidential meeting details

healthcare

Moderate risk for patient appointment scheduling

financial analysis

Moderate risk for financial meeting scheduling

education

Excellent for class scheduling and academic calendar management

creative writing

Useful for deadline and writing session scheduling