CalMesh is an AI-first calendar API that aggregates Google, Microsoft, Apple, and CalDAV calendars into a single unified REST API. It includes an official MCP (Model Context Protocol) server so AI agents can manage calendars natively.

What is the CalMesh MCP server?

The CalMesh MCP server is an official Model Context Protocol server with 19 tools that lets AI assistants like Claude, ChatGPT, and others directly manage calendars, check availability, create bookings, and run scheduling polls. Install with: npx @calmesh/mcp-server

How much does CalMesh cost?

CalMesh starts at EUR 8/year for the Agent plan (REST API, MCP server, webhooks, scoped API keys, iCal feed). The Pro plan is EUR 12/year (adds booking pages, embeddable widget, email notifications). The Business plan is EUR 15/user/year during beta (normally EUR 99/user/year) and adds AI-first support with 48h SLA, team admin, and aggregated billing. All plans include a 14-day free trial.

Which calendar providers does CalMesh support?

CalMesh supports Google Calendar, Microsoft Outlook/Exchange, Apple Calendar (via CalDAV), generic CalDAV servers, and iCal feed URLs. All sources are merged into unified calendars with consistent event schemas.

How do I connect CalMesh to my AI agent?

Sign up at calmesh.xyz, connect your calendars, generate a scoped API key, then either use the REST API directly or install the MCP server with: CALMESH_API_KEY=cm_live_... npx @calmesh/mcp-server. Setup takes about 60 seconds.

Calendar infrastructure

The only calendar API built for AI agents.

Connect every calendar. One unified API. Your agent handles the rest.

Open Beta

Start 14-day free trial

Credit card required. Not billed until day 15.

One API. Every calendar.

Query events, check availability, detect conflicts, book slots. Across Google, Microsoft, Apple, CalDAV, and iCal feeds.

check-availability.sh

# Check availability across all calendars
curl "https://calmesh.xyz/api/v1/calendars/work/availability?date=2026-03-15" \
  -H "Authorization: Bearer cm_live_..."

# Response
{
  "date": "2026-03-15",
  "slots": [
    { "start": "09:00", "end": "09:30" },
    { "start": "10:30", "end": "11:00" },
    { "start": "14:00", "end": "14:30" }
  ]
}

MCP Server — Claude Desktop

npx @calmesh/mcp-server --api-key cm_live_...

Setup in 60 seconds

1

Sign up and connect your calendars

2

Generate a scoped API key

3

Configure your MCP server or call the REST API

Pricing

All your calendars, unified. For less than a coffee a month.

14-day free trial. Credit card required, not billed until day 15.

Agent

For developers & AI builders

EUR 8/year

✓ Unlimited sources
✓ REST API + MCP server
✓ Webhooks
✓ Scoped API keys
✓ iCal feed

Start Free Trial

Pro

For freelancers & consultants

EUR 12/year

✓ Everything in Agent
✓ Booking pages
✓ Embeddable widget
✓ Email notifications

Start Free Trial

Business

For teams wanting support & admin

EUR 99BETA

EUR 15/user/year

✓ Everything in Pro
✓ AI-first support (48h SLA)
✓ Team admin dashboard
✓ Aggregated billing

Start Free Trial

Stop worrying about calendar integrations. We got you.

60 seconds to connect. Zero maintenance forever.

Open Beta

Start 14-day free trial

Credit card required. Not billed until day 15.