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MCP Comparison · 2026

Google Calendar vs Slack MCP Server

Comparing Google Calendar and Slack as MCP servers? Google Calendar (manage calendar events) is best when scheduling assistants. Slack (read & post slack messages) is best when automated slack notifications. Both run as Model Context Protocol servers and can coexist in the same client. Updated 2026.

Google Calendar31

Google Calendar

Read, create, and manage events across Google Calendar.

Slack

Slack

Read and send Slack messages, manage channels and threads.

Side-by-side specs

Pulled from each MCP's verified fact sheet.

 Google CalendarSlack
Primary functionManage Calendar EventsRead & Post Slack Messages
MaintainerCommunity (GongRzhe)Anthropic (modelcontextprotocol)
PricingFreeFree
Setup complexityMedium · ~10 minMedium · ~10 min
Transportstdiostdio
Auth modelOAuth 2.1API key
LicenseMITMIT
LanguageTypeScriptTypeScript
Latest versionlatestlatest
Compatible clientsClaude, Cursor, Any MCP-compatible client, Google accountsClaude, Any MCP-compatible client, Slack workspaces
Last verified2026-04-192026-04-19

Which one should you pick?

Decision rubric drawn from each MCP's documented strengths.

Choose Google Calendar

  • Scheduling assistants
  • Find-a-slot flows
  • Meeting-prep agents
See full Google Calendar write-up →

Choose Slack

  • Automated Slack notifications
  • Channel monitoring
  • Message summarization
See full Slack write-up →

Pick something else if…

  • Bulk calendar exports
  • Non-Slack messaging platforms

Feature breakdown

Key capabilities each server ships out of the box.

Google Calendar

  • OAuth 2.1 with scoped calendars
  • Free-busy queries
  • Event CRUD with attendees
  • Multiple-calendar support
  • Respect for per-user ACLs

Slack

  • Channel read/write access
  • Thread management
  • Message search
  • User lookup
  • Slack API integration

Install snippets

Open the detail page for ready-to-paste config for every major client.

Install Google Calendar

Setup snippets for Claude, Cursor, VS Code, Windsurf →

npx -y @gongrzhe/google-calendar-mcp

Install Slack

Setup snippets for Claude, Cursor, VS Code, Windsurf →

npx -y @modelcontextprotocol/server-slack

FAQ

Google Calendar vs Slack: which MCP server should I use?

Pick Google Calendar when scheduling assistants. Pick Slack when automated slack notifications. Google Calendar is built for manage calendar events, while Slack focuses on read & post slack messages.

Can I run both Google Calendar and Slack together?

Yes. MCP clients run each server as a separate process and surface every server's tools simultaneously, so you can install both and let your agent decide which to call. Be deliberate with auth scopes when stacking servers.

How fresh is this comparison?

Updated for 2026. Google Calendar's last verification: 2026-04-19. Slack's last verification: 2026-04-19. We refresh detail-page facts on every catalog rebuild.

More Google Calendar comparisons

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