MCP.Market

Ms Calendar MCP server

by 0xka13b·io.github.0xka13b/ms-calendar-mcp·v1.0.1
No reviews yet

Microsoft Calendar (Outlook Calendar) MCP server for managing events via Microsoft Graph.

C63/100grade C
Write a reviewInstall
What users say
No reviews yet
Be the first
Safety scan
C63/100

full report

Adoption
New

0 stars35 downloads/wk

Reviews

Write one

Nobody has reviewed Ms Calendar yet.

If you have run it, two minutes of your experience saves the next person an afternoon.

Ms Calendar tools (9, 3 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • check_availability

    Check free/busy schedule for the current user and optional additional attendees within a time window.

  • create_eventwrite action

    Create a new calendar event.

  • delete_eventwrite action

    Delete a calendar event. If the user is the organizer, cancellation notices are sent to attendees.

  • get_event

    Get a single calendar event by ID.

  • list_events

    List calendar events within a date range. Recurring events are expanded.

  • me

    Get the signed-in user's profile (id, displayName, mail).

  • respond_event

    Accept, decline, or tentatively accept a calendar invitation.

  • search_events

    Search calendar events by keyword.

  • update_eventwrite action

    Update calendar event properties.

Public scan report

scanner v0.1.9 · 2026-09-27 · same rubric, same numbers if you re-run it

1 high
  • Code scan2 source files scanned13/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 111 days ago8/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Findings (1)

  • highShell command built from a string (injection risk)exec.shell-concat
    dist/index.js: …== "win32" ? 'start ""' : "xdg-open"; exec(`${cmd} "${url}"`, () => { }); }; var loginViaBro…
Overall 63/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Ms Calendar compares

Against every graded Email MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
63/100
higher than 18% of 916 Email servers
Tools
9
the typical Email server has 7
Tools that change things
33%
typical: 25%. Fewer write tools means less an agent can break
Downloads a week
35
more than 21% of 235 Email servers with a package

What its tools let an agent do: 6 read · 1 create · 1 change · 1 delete

Install Ms Calendar in Claude Code, Cursor or VS Code

Runs npx -y ms-calendar-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add ms-calendar-mcp -- npx -y ms-calendar-mcp
Add to Cursor

What the publisher says

From the Ms Calendar repository's README, as published. We do not edit it. Read it on GitHub

        

Microsoft MCP

Model Context Protocol servers for Microsoft 365. Calendar · Contacts · OneDrive · Outlook · SharePoint — on the official @modelcontextprotocol/sdk, over stdio or Streamable HTTP.

Each server speaks the real MCP protocol and runs over either transport:

  • stdio — for local MCP clients that launch the server as a subprocess (Claude Desktop, IDEs, the MCP Inspector).
  • Streamable HTTP — for remote/hosted use, with the Microsoft Graph access token supplied per request via Authorization: Bearer.

Servers

All tools are thin wrappers over the Microsoft Graph v1.0 API.

Layout

microsoft-mcp/
├── apps/                       # one MCP server per Microsoft 365 product
│   ├── calendar/
│   ├── contacts/
│   ├── onedrive/
│   ├── outlook/
│   └── sharepoint/
│       └── src/
│           ├── tools.ts        # declarative tool definitions (schema + handler)
│           └── index.ts        # run({ name, version }, tools)
└── packages/                   # shared building blocks
    ├── core/                   # MCP server bootstrap + dual transport (stdio / HTTP)
    ├── graph/                  # Microsoft Graph HTTP client
    ├── validation/             # id / path / query sanitizers
    └── logger/                 # structured JSON logging (stderr-only — stdio-safe)

A server is just a list of tools handed to run():

// apps/calendar/src/index.ts
import { run } from "@microsoft-mcp/core";
import { tools } from "./tools.js";

void run({ name: "microsoft-calendar", version: "1.0.0", title: "Microsoft Calendar" }, tools);
// a single tool
defineTool({
  name: "get_event",
  description: "Get a single calendar event by ID.",
  inputSchema: { event_id: z.string().describe("Event ID") },
  confirmationPolicy: "never",
  handler: ({ graph }, { event_id }) => {
    validateId(event_id, "event_id");
    return graph.request("GET", `/me/events/${event_id}`);
  },
});

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

Ms Calendar: common questions

Is Ms Calendar MCP server safe?
With care: it is graded C, so read the findings first (63/100). Read the Ms Calendar safety report
How do I install Ms Calendar?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Ms Calendar need an API key?
No secret keys are declared. It reads 1 setting from the environment.
Is Ms Calendar maintained?
The last commit was 149 days ago (2026-06-08). The latest release is v1.0.1.
What can I use instead of Ms Calendar?
Servers from other publishers that do the same job: Outlook MCP server, Outlook Assistant MCP server and Microsoft 365 Mail MCP server.
How does Ms Calendar compare with other Email MCP servers?
safety score 63/100 (higher than 18% of 916 Email servers); tools 9 (the typical Email server has 7); tools that change things 33% (typical: 25%. Fewer write tools means less an agent can break). Full comparison.

Alternatives to Ms Calendar

Same job from other publishers: the closest match first, then the best rated.

  • Outlook MCP
    Microsoft Outlook personal accounts: mail, rules, calendar, contacts, to-do, drafts (77 tools).
    A
  • Outlook Assistant
    Microsoft Outlook MCP server — 22 tools for email, calendar, contacts, and mailbox management.
    More from littlebearapps →
    A
  • Microsoft 365 Mail
    Microsoft 365 Outlook mail via Graph: read, search, send, reply, forward, draft, move, delete.
    More from mindstone →
    A
  • Mailoo - Email MCP Server
    Email MCP server for AI agents: IMAP/SMTP, Gmail, Outlook, calendar, ManageSieve, AI triage, OAuth2.
    A
  • MCPEmails
    Never-stored live email: read, send and triage Gmail, Outlook / Microsoft 365, or any IMAP mailbox.
    A

More from 0xka13b →