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MCP Comparison · 2026

Cal.com vs Calendly MCP Server

Comparing Cal.com and Calendly as MCP servers? Cal.com (book and manage appointments) is best when agentic booking assistants. Calendly (share booking links) is best when external booking workflows. Both run as Model Context Protocol servers and can coexist in the same client. Updated 2026.

Cal.com

Cal.com

Official Cal.com hosted MCP — AI agents book, reschedule, and query availability across 34 tools via OAuth 2.1, no local install.

Calendly

Calendly

Official hosted MCP for booking-link scheduling — share availability without exposing the raw calendar.

Side-by-side specs

Pulled from each MCP's verified fact sheet.

 Cal.comCalendly
Primary functionBook and Manage AppointmentsShare Booking Links
MaintainerCal.com (official)Calendly
PricingFreemiumFreemium
Setup complexityLow · ~5 minLow · ~5 min
TransportStreamable HTTPStreamable HTTP
Auth modelOAuth 2.1OAuth 2.1
LicenseAGPL-3.0Proprietary
LanguageTypeScriptHosted service
Latest versionlatestGA
Compatible clientsClaude, Cursor, Any MCP-compatible client that supports OAuth 2.1Claude, Cursor, Any MCP client with Dynamic Client Registration
Last verified2026-06-282026-06-25

Which one should you pick?

Decision rubric drawn from each MCP's documented strengths.

Choose Cal.com

  • Agentic booking assistants
  • Product-embedded scheduling workflows
  • Demo and onboarding scheduling
See full Cal.com write-up →

Choose Calendly

  • External booking workflows
  • Recruiter and sales flows
  • Read-only upcoming-meetings views
See full Calendly write-up →

Pick something else if…

  • Raw calendar event management outside booking flows
  • Internal team scheduling

Feature breakdown

Key capabilities each server ships out of the box.

Cal.com

  • Official Cal.com hosted MCP at mcp.cal.com
  • OAuth 2.1 + Streamable HTTP transport (no local setup)
  • 34 tools: event types, bookings, availability, schedules
  • Free and paid Cal.com plans supported
  • Open-source self-host option available

Calendly

  • Fully-hosted remote server (mcp.calendly.com)
  • OAuth 2.1 with Dynamic Client Registration + PKCE
  • Event-type management
  • Availability queries
  • Scheduled-event listing and cancellation
  • Booking-link generation

Install snippets

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

Install Cal.com

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

Connect to https://mcp.cal.com/mcp (hosted; OAuth 2.1, no local install)

Install Calendly

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

Connect to https://mcp.calendly.com (hosted; no install)

FAQ

Cal.com vs Calendly: which MCP server should I use?

Pick Cal.com when agentic booking assistants. Pick Calendly when external booking workflows. Cal.com is built for book and manage appointments, while Calendly focuses on share booking links.

Can I run both Cal.com and Calendly 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. Cal.com's last verification: 2026-06-28. Calendly's last verification: 2026-06-25. We refresh detail-page facts on every catalog rebuild.

More Cal.com comparisons

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Browse all Scheduling & Calendar MCPs? See the full ranked list →