CalendarMCP

Name: CalendarMCP
Author: Full-Vibe

by Full-Vibeversion 1.0.0i★ –iRuns in the cloud

Registry nameai.calendarmcp/server

Install

Overview

Description from the maker (original English)

Hosted Google Calendar MCP server for AI agents. No self-hosting or Google Cloud setup.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs in the cloud
Transport: Streamable HTTP
Category: Docs, sheets & office work
You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http server https://calendarmcp.ai/api/mcp --header 'Authorization: your-value'

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "server": {
      "url": "https://calendarmcp.ai/api/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "server": {
      "type": "http",
      "url": "https://calendarmcp.ai/api/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

Authorization secret required HTTP header
Bearer token. Get yours at https://calendarmcp.ai/dashboard

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain calendarmcp.ai (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Docs, sheets & office worki

More stars than 0% of the other 2171 servers in this category
Published to the registry more recently than 10% of the other 2171 servers in this category
Basic checks equal to or better than 100% of the other 2171 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is CalendarMCP safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 6 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Agent-Native Calendar, Excel MCP Server, MCP Server for Excel

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Agent-Native Calendar

by BuilderIO

Agent-Native Google Calendar - manage events, sync, and public booking

Runs in the cloud★ 7,620MITUpdated 2 months ago

Install

Excel MCP Server

by haris-musa

Lets AI create and edit Excel files itself, including formulas, charts and PivotTables, without Excel installed.

Runs on your computer★ 4,276MITUpdated 6 days ago

Install

MCP Server for Excel

by sbroenne

Excel automation for AI - Sheets, Power Query, DAX, VBA, Tables, Ranges and more. Windows only.

Runs on your computer★ 847MITUpdated 3 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

CalendarMCP

The hosted Google Calendar MCP server. Connect any AI agent to your Google Calendar in about two minutes. No self-hosting, no Docker, no credentials.json.

What this is

CalendarMCP is a hosted Model Context Protocol (MCP) server for Google Calendar. Connect your Google account once, get an API key, and any MCP-compatible client (Claude Desktop, Claude Code, Claude.ai, Cursor, OpenClaw, Continue, Cline, Windsurf, Goose, Zed, ChatGPT custom GPTs, n8n, etc.) can read and write your calendar.

This repo is the public docs, manifest, and client examples for the service. The hosted service is not open source. If you want a self-hosted alternative, the most popular OSS option is nspady/google-calendar-mcp and we recommend it for users who want OAuth tokens to never leave their machine.

What CalendarMCP gives you that self-hosted MCPs do not

Zero setup. One Google OAuth click. No credentials.json, no Google Cloud Console, no Docker.
HTTP transport. Works with Claude.ai, Claude Code, Cursor, and any hosted MCP client. Self-hosted stdio MCPs only work with Claude Desktop.
Batch operations. batch_update_events updates up to 50 events in one concurrent call. Renaming a recurring meeting across a year is one prompt, not 50 clicks.
Multi-account, one key. Connect any number of Google accounts (mix OAuth and service-account-shared calendars) under a single API key. Reading fans out across all of them, results merged and sorted.
Google Advanced Protection support. The only hosted MCP that works for GAP users (via service-account sharing. OAuth is blocked for those accounts).
Per-calendar Read/Write matrix. Tighten what each agent can touch from the dashboard without minting new keys.

Quick start

Visit calendarmcp.ai, sign in with Google, and copy your API key.
Add the MCP server to your client of choice. Configs below.
Talk to your agent: _"What do I have on Tuesday?"_

Client configs

Drop these into the right config file for your MCP client.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

"mcpServers": { "calendar": { "command": "npx", "args": [ "@modelcontextprotocol/server-fetch", "https://calendarmcp.ai/api/mcp" ], "env": { "MCP_AUTH_HEADER": "Authorization: Bearer YOUR_CALENDARMCP_API_KEY" } } } }

See examples/claude-desktop.json and our Claude Desktop integration guide.

Claude Code

claude mcp add calendar https://calendarmcp.ai/api/mcp \

--transport http \ --header "Authorization: Bearer YOUR_CALENDARMCP_API_KEY"

See examples/claude-code.sh and our Claude Code integration guide.

Cursor

~/.cursor/mcp.json:

"mcpServers": { "calendar": { "url": "https://calendarmcp.ai/api/mcp", "headers": { "Authorization": "Bearer YOUR_CALENDARMCP_API_KEY" } } } }

See examples/cursor.json and our Cursor integration guide.

OpenClaw

In your openclaw.json:

"plugins": { "entries": { "mcp-calendarmcp": { "enabled": true, "config": { "url": "https://calendarmcp.ai/api/mcp", "authHeader": "Bearer YOUR_CALENDARMCP_API_KEY" } } } } }

See examples/openclaw.json and our OpenClaw integration guide.

Other clients

See examples/ for Continue, Windsurf, Goose, n8n, and more.

Tools

CalendarMCP exposes 11 tools. The full machine-readable schema lives at https://calendarmcp.ai/api/docs.

Tool	Description
`list_events`	List events across one or all connected calendars in a time range. Auto-paginates up to 2500 results.
`get_event`	Full details of one event.
`create_event`	Create an event. Supports attendees, location, reminders, recurrence, all-day.
`update_event`	Partial update of an existing event.
`delete_event`	Delete an event.
`quick_add_event`	Create from natural language ("Lunch with Sam Friday 1pm").
`list_calendars`	List every calendar the API key can see, with per-calendar R/W permissions.
`find_free_time`	Free/busy query across one or more calendars. The right thing to call before `create_event` to prevent double-booking.
`manage_attendees`	Add or remove attendees from an event.
`batch_update_events`	Update up to 50 events in one concurrent call.

Full reference: docs/tools.md.

Authentication

API keys are issued from the dashboard at calendarmcp.ai/dashboard. One key can hold any number of connected Google accounts. Per-calendar R/W scopes are enforced server-side.

Rate limit: 60 requests/minute per key. Free tier; pay-as-you-go pricing for higher limits coming soon.

See docs/authentication.md.

Google Advanced Protection

If you have Google Advanced Protection enabled, OAuth into third-party calendar apps is blocked by Google policy. CalendarMCP supports a service-account sharing flow that works for GAP users. We're the only hosted MCP we know of that supports this.

See docs/google-advanced-protection.md.

Roadmap

✅ Google Calendar (live)
⏳ Microsoft Outlook Calendar (waitlist)
⏳ iCloud Calendar (waitlist)
⏳ CalDAV (any provider)

Pricing

Free tier with generous limits. Paid plans land soon for power users.

See calendarmcp.ai/pricing.

Comparison

Feature	CalendarMCP	nspady (OSS)	Composio	Zapier MCP
Hosted	✅	❌	✅	✅
HTTP transport	✅	❌ (stdio only)	✅	✅
Setup time	2 min	25 min	10 min	5 min
Batch update events	✅	❌	❌	❌
Multi-account, one key	✅	❌	❌	❌
Google Advanced Protection	✅	❌	❌	❌
Per-calendar R/W matrix	✅	❌	❌	❌
Open source	❌	✅	partial	❌
Tokens on your machine	❌	✅	❌	❌

Honest read: pick nspady if you only use Claude Desktop and want zero third parties. Pick CalendarMCP for everything else.

Contributing

This repo is docs and examples. PRs welcome for:

New client config examples
Doc improvements and clarifications
Translations

Service issues (bugs, feature requests for the hosted product) → GitHub Issues.

License

Examples and docs in this repo: MIT (see LICENSE).

The hosted service is not open source.

CalendarMCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Docs, sheets & office worki

Common questions

Alternatives

Agent-Native Calendar

Excel MCP Server

MCP Server for Excel

README from the maker

CalendarMCP

What this is

What CalendarMCP gives you that self-hosted MCPs do not

Quick start

Client configs

Claude Desktop

Claude Code

Cursor

OpenClaw

Other clients

Tools

Authentication

Google Advanced Protection

Roadmap

Pricing

Comparison

Contributing

License

Links