Zovo Calendar MCP Server

All servers · Buy Pro $19 · All 46 for $39 · Source

Two ways to run it, both free to start. Open mcp.zovo.one/mcp/connect, copy the calendar URL and paste it into any client that takes a URL. It already carries a free token, so there is nothing to install, no account and no header to set. The URL is https://mcp.zovo.one/mcp/calendar/t/<token>. The token is not optional: the bare https://mcp.zovo.one/mcp/calendar connects and lists its tools and then answers every tool call with HTTP 401, so use the link from /mcp/connect or send Authorization: Bearer <token>. Or download calendar.mcpb and double-click it in Claude Desktop.

mcp-calendar

Your calendar app can show you next Tuesday. It cannot tell you where your week actually went, which two things you said yes to at the same time, or how many billable hours last month's meetings were worth. This server reads the .ics file your calendar already exports and answers those questions: events in any window with recurring series expanded properly, merged busy blocks and the real free gaps inside your working hours, every double booking across work and personal calendars at once, a clean .ics of just the events you picked, and the exact time entry for a meeting you should have billed. No account is connected, nothing is synced, and the calendar file stays on your machine as plain text.

Built by theluckystrike.

In the official MCP Registry (io.github.theluckystrike/calendar-ics-reader-events-freebusy-conflicts).

Listed on the AI Product Index — live remote endpoint at mcp.zovo.one/s/calendar, free tier, no signup.

Import the.ics your calendar exports, then ask what is on, when you are free, and what clashes, zero setup, all local.

60-second install

npm publish for @theluckystrike/mcp-calendar is pending. Until then, the .mcpb one-click bundle or a clone+build is the working path, both are verified below.

One-click (.mcpb): download calendar.mcpb from the latest release and double-click it in Claude Desktop: https://github.com/theluckystrike/mcp-servers/releases/latest

(claude_desktop_config.json):

{
  "mcpServers": {
    "calendar": {
      "command": "npx",
      "args": ["-y", "@theluckystrike/mcp-calendar"]
    }
  }
}

Claude Code:

claude mcp add calendar -- npx -y @theluckystrike/mcp-calendar

(.cursor/mcp.json):

{
  "mcpServers": {
    "calendar": {
      "command": "npx",
      "args": ["-y", "@theluckystrike/mcp-calendar"]
    }
  }
}

The npx form above starts working the moment the package is published. Until then, use the.mcpb bundle above, or build from source with exactly these four commands:

git clone https://github.com/theluckystrike/mcp-servers.git && cd mcp-servers
npm install
npm run build -w packages/mcp-license -w servers/timezone -w servers/calendar

Then point your client's command at node with one arg: the absolute path to servers/calendar/dist/index.js.

To run in Pro mode set MCP_LICENSE_KEY in the same config block, or call license_activate once with your key.

Getting the.ics out of your calendar

App	Where
Google Calendar	Settings -> Import & export -> Export. You get a zip; import the .ics inside it.
Apple Calendar	File -> Export -> Export...
Outlook (desktop)	File -> Save Calendar, format iCalendar (.ics)
Outlook / Microsoft 365 (web)	Settings -> Calendar -> Shared calendars -> Publish, then use the ICS link (Pro)
Anything else	Any published feed URL ending in .ics, or webcal:// (Pro)

Then: ics_import {path: "~/Downloads/mike@example.com.ics", name: "work"}

Tools

Tool	What it does
ics_import	Read a .ics file (path), pasted contents (text) or a public feed (url, Pro) and keep it locally under a name. Importing the same name again replaces it.
calendars_list	Every imported calendar: name, source, event count, size, when it was imported.
events_list	Every event between two dates with recurring series expanded to real occurrences, sorted, in your own time zone. Each row carries an id.
events_search	Events whose title, description, location, organizer or attendees contain a phrase.
free_busy	Merged busy blocks and the free gaps inside your working hours, day by day. Events marked free/transparent do not count as busy.
conflicts	Every pair of events that overlap, with the overlap in minutes -- across all calendars, so a client call clashing with a school run is caught. A longer window is shortened to the free 31 days and answered, never refused.
next_event	The next thing that has not started, and how long until it does.
event_export	Write chosen events (by id, or a whole window) to a new .ics you can send. Times in UTC, so it lands correctly in any client.
event_to_time_entry	Turn one meeting into the exact arguments for the time-tracker's entry_add, so a call becomes billable time without retyping it.
ics_forget	Remove one calendar and its local copy.
license_status / license_activate	Show the tier; activate a Pro key offline.

Resource calendar://today gives today's schedule in one read. Prompt plan_my_day walks the whole loop: what is on, what clashes, where the free stretches are, and which finished meetings to bill.

What the parser handles

Written against real exports, not just the spec: line folding (CRLF, bare LF and bare CR, and folds that Exchange places inside a multi-byte character, which are rejoined on the bytes before decoding), \n \, \; \\ escaping, whole-day events with an exclusive DTEND, DURATION instead of DTEND, TZID and UTC times, floating times, RRULE for HOURLY, DAILY, WEEKLY, MONTHLY and YEARLY with COUNT, UNTIL (inclusive), INTERVAL, BYDAY including ordinals (2MO, -1FR), BYMONTHDAY, BYMONTH and BYSETPOS, EXDATE, RDATE, RECURRENCE-ID overrides (the moved instance replaces the original instead of appearing twice), STATUS:CANCELLED, TRANSP:TRANSPARENT, and VALARM blocks inside an event. An event it cannot read is skipped and counted rather than costing you the rest of the file.

FREQ=MINUTELY and FREQ=SECONDLY are deliberately not expanded: one such rule fills any window with thousands of occurrences and buries the rest of the week. Those events are listed at their first occurrence and the reason is said out loud. A rule with no COUNT and no UNTIL is expanded only as far as the window you asked for.

Exports written by this server keep whole-day events as DATE values, so a holiday leaves as the same day it arrived rather than a timed block on the day before in your machine's zone.

VTIMEZONE is deliberately ignored. A file's inline DST rules are only as fresh as the app that wrote it; the TZID is kept and every offset is computed from the ICU data inside your Node build instead, which is what keeps a weekly Warsaw 10:00 meeting at 10:00 local across the March clock change.

Free vs Pro

	Free	Pro ($19 one-time)
Calendars kept	2	unlimited
Window per question	up to 31 days	any window
conflicts over a longer window	answered for the first 31 days, cap named	any window
Events per export	50	unlimited
Import from a URL or webcal feed	--	yes
Everything else	full	full

Get Pro, or $39 for every server in the suite, lifetime. Or the 46-server bundle for $39.

Privacy

Everything is local. The calendar file you import is copied to ${XDG_DATA_HOME:-~/.local/share}/mcp-servers/calendar/ and read from there; deleting that directory resets the server. There is exactly one network call in the whole server, and only when you pass a url yourself: it fetches that address once, with a 12-second timeout, a 5 MB cap, and a refusal on loopback, private and cloud-metadata addresses. Nothing is uploaded, no account is linked, and licence keys verify offline.

Pairs with

• mcp-timezone, this server reads its time zone and .ics engine from it: convert a meeting time, find slots across countries, write an invite.
• mcp-time-tracker, event_to_time_entry hands it a finished meeting; it tracks and reports the hours.
• mcp-invoice, turn those tracked hours into a numbered invoice.
• office-suite, several servers behind one install, one config entry.

FAQ

No. There is no OAuth, no token and no sync. You export a file (or paste a public feed URL on Pro) and it is read locally. That also means an import is a snapshot: re-import when the calendar has moved on.

Yes, and that is most of the code. A weekly series is expanded on the wall clock, so a Warsaw 10:00 meeting stays 10:00 through the DST change rather than drifting to 11:00. Monthly on the 31st skips February instead of rolling into March, UNTIL includes the occurrence that falls exactly on it, and a single moved instance replaces the original.

It is not: RFC 5545 makes DTEND exclusive for a whole-day event, so 1--3 June means the 1st and the 2nd. This server follows the spec, which is what your calendar app does too.

It writes .ics files with event_export, which you can import anywhere. It never modifies the calendar it read.

5 MB, which is a few thousand events. Export a narrower date range if a full history is bigger than that.

First five minutes

Three prompts that scored 3 of 3, measured in round 18, 2026-09-05. Paste one in as it is written.

Here is my work calendar. Import it as Work. [1,594-byte .ics pasted as text, 8 events, week of 2026-09-07, Europe/Warsaw]

Paste this into Claude with the server connected.

What it did, measured in round 18, 2026-09-05: One ics_import {name: Work, text: <8 events>}.

What is on my calendar next week?

Paste this into Claude with the server connected.

What it did, measured in round 18, 2026-09-05: One events_list {calendar: Work, from: 2026-09-07, to: 2026-09-14}; the model itself narrowed the 9-row raw window (which spilled one row into the following Monday's standup occurrence) back to Mon 9/7-Sun 9/13 for 'next week'.

Where do I have a free two-hour block next week between 9 and 17 Warsaw time?

Paste this into Claude with the server connected.

What it did, measured in round 18, 2026-09-05: One free_busy {calendars: [Work], zone: Europe/Warsaw, work_start: 09:00, work_end: 17:00}.

On the free tier for this path: 2 calendars, windows up to 31 days, exports up to 50 events, conflict checks answered over the first 31 days of any window.

Set it up in your client

Exact config path, entry and caveats: Claude Desktop · Claude Code · Cursor · VS Code · Windsurf · Cline · Claude.ai and Claude Desktop connectors · all clients

Compared with the alternatives

MCP Calendar vs mcp-ical and google-calendar-mcp - which MCP server to pick · all comparisons

Guides

How to track billable hours inside Claude Code and Cursor · Create an invoice PDF from a chat message with an MCP server · Ask questions about an Excel or CSV file from Cursor or Claude · Watch a product price with Claude and get told when it drops · What the free tier includes and what Pro adds · Log expenses and mileage in Claude, split VAT, rebill to an invoice · Convert currencies in Claude with real ECB rates, no API key · Generate Word proposals and contracts from a chat message · Find a meeting time across time zones without doing the arithmetic · Write a resume and a cover letter from chat, without inventing anything · Bill a retainer on a schedule without a billing SaaS · Assemble a contract from your own clause library, in chat · Connect MCP servers to Claude.ai, Claude Desktop, Cursor and VS Code without installing anything · Merge, split and stamp PDFs from chat, and why some come back as glyph numbers · Read a.ics calendar in Claude: free and busy, conflicts, and billable meetings · Run a kanban board in Claude, with time tracking on the same task · Resize, compress and watermark images from a chat message · Categorize and reconcile a bank CSV export from chat · Send a quote from chat, then turn the yes into an invoice · Put a SEPA payment QR code on an invoice from chat · Zip and unzip archives safely from Claude or Cursor · Client deposits and retainers from chat, applied to your real invoices · Fixed assets and depreciation from chat, on the rates the tax authorities publish · Per diem and travel allowances from chat, on the rate tables the tax authorities publish · One double-entry ledger out of every server you already run · Loan and lease schedules from chat, closing exactly on zero · Work orders and job cards from chat, and why the markup goes on the unit cost · Price lists and rate cards from chat, and the 100x scale gap between the invoice and the quote · Change orders and the running contract value from chat, and why a changed line is two items · A petty cash float from chat, and why the cheque is not the sum of the vouchers · Client statements and payment chasers from chat, aged as at any date you name · Credit notes and purchase orders from chat, against your real invoices · One install, every server: the office-suite bundle · Close a month in chat: invoice, credit note, retainer, bank reconciliation, statement · MCP server not showing up in Claude Desktop: the six checks that find it · Where is claude_desktop_config.json, and what goes in it · claude mcp add: every flag, and the scope that silently loses your server · MCP servers on Windows: spawn npx ENOENT, backslashes and the PATH · Installing these MCP servers when npx does not work yet · Cursor MCP setup: mcp.json, the required type field, and where the servers appear · Which MCP servers work with no network at all · Invoicing an EU client with reverse charge, from a chat message · Quote, deposit, invoice, statement: the whole cycle in one conversation · Is this project making money? Hours against costs, without a spreadsheet · Building a tax year pack for your accountant from chat · Keeping a mileage log in chat, with the rate you actually claim · Reconciling a bank CSV against what you invoiced and spent · Rebilling client expenses, with a markup and the VAT handled honestly · Chasing an unpaid invoice: aging, then the letter · A bill of sale from chat, with the identifiers checked and the signature lines printed · Pricing a job from a rate card, and what to do when the scope changes · Working out your hourly rate from what you actually billed · Converting CSV to xlsx and back without opening Excel · Asking a spreadsheet questions in plain language · Merging a folder of receipts into one PDF from chat · Splitting one big scan into separate documents · Sending a month of paperwork as one archive, safely · MCP servers in VS Code: the one-word mistake that breaks every config · MCP servers in Windsurf and Cline: two defaults that waste an afternoon · Local MCP server or hosted URL: which one, and what you give up · What these MCP servers actually do on the free tier · Choosing an MCP server for invoicing: the seven questions worth asking · When you need an MCP server, and when a prompt is enough · MCP config file locations and JSON keys, every client · Why an MCP server does not appear, in order of likelihood · How MCP registry search actually works, measured · What is actually in the MCP registry: 6,000 rows counted · stdio or streamable HTTP: which MCP transport, and what breaks · MCP protocol versions: what each one changed · Every field in an MCP server config entry, by client · MCP config scopes: which definition wins when a server is defined twice · Where each MCP client writes its logs · Shipping an MCP server: a bundle to download or a URL to paste · What is inside a.mcpb MCP bundle · Charging for an MCP server: how licensing actually works · How much text an MCP server may return, and how much it may describe · What to check before letting an MCP server run · Why a directory says your hosted MCP server is not responding · The MCP registry binds one remote URL to one server name · Capital letters in your GitHub username change your MCP registry rank · How many MCP servers already have your word in the name · server.json field reference for the MCP registry · When an MCP tool fails, do not return a JSON-RPC error · structuredContent and outputSchema in MCP, and what MUST hold · Rules for naming an MCP tool, and the collision nobody plans for · MCP has no session, so how do two tool calls share state · x-mcp-header: mirroring tool parameters into HTTP headers · How a directory scores an MCP server, and why your worst tool decides it · What AI crawlers fetch that Googlebot does not, measured on 141 URLs · Search Console's URL Inspection API changes its answer between calls · Which MCP servers work by pasting a URL, with nothing installed · Where to find MCP servers that cost money, and how you actually pay · Getting an assistant to fill in a quote or estimate for a customer · Is there an MCP server for a petty cash book or a cash ledger · Currency conversion in an assistant, and which MCP server to use · Zipping and unzipping archives from an assistant, and what the guards do · Producing a delivery schedule or a work order document from a chat · Will an MCP server email the invoice to my client · Can an assistant read a photo of a receipt and log the expense · Which MCP server can generate invoice PDFs from a chat message? · Can an MCP server read a bank statement PDF and categorise the transactions? · Best MCP servers for small business accounting and paperwork in 2026 · MCP Supplier Directory: keep supplier lists from rotting in a spreadsheet · MCP Service Agreement: stop copying a rotting contract template off the internet · MCP Maintenance Log: know what service is due without anyone remembering · MCP Mileage Log: keep the deductible log at the moment of the drive, not in April · Invoice payment terms best practices: Net 30, due date and late fees · How to categorize bank transactions · Petty cash log template · All guides

More servers

MCP Barcode · MCP Zip · MCP Billing Docs · MCP Deposits · MCP Per Diem Calculator — Employee Travel Allowances from Claude · MCP Server for Fixed Asset Register — Depreciation from Claude · MCP Server for Statements of Account — Customer Balances from Claude · MCP Server for Cash Book — Receipts, Payments and Balances from Claude