MCP.Market

Calendar Bridge MCP server

online · 100% uptime
by IsaiahDupree·io.github.IsaiahDupree/calendar-bridge·v1.3.0
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Connects ChatGPT to your Apple Calendar via a local Mac agent + Vercel relay

A97/100grade A
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Safety scan
A97/100

full report

Adoption
Growing

0 stars

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Calendar Bridge tools

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Public scan report

scanner v0.1.10 · 2026-11-05 · same rubric, same numbers if you re-run it

no findings
  • –Code scanremote-only server, no package to scann/a
  • Live reliabilityremote reachable in 256ms (auth required)20/20
  • –Tool poisoningtools not inspected (endpoint requires auth); not countedn/a
  • Auth qualityOAuth resource metadata advertised on 40115/15
  • Maintenancelast push 12 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 97/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Calendar Bridge compares

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

Safety score
97/100
higher than 98% of 1,119 Developer tools servers
Uptime
100%
of our recent checks; the typical remote Developer tools server answers 100%
Response time
235 ms
faster than 59% of 443 Developer tools servers

Install Calendar Bridge in Claude Code, Cursor or VS Code

claude mcp add --transport http calendar-bridge https://calendarbridge.vercel.app/mcp
Add to Cursor

What the publisher says

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

📅 CalendarBridge

Your Apple Calendar, in ChatGPT — on your own Mac.

CalendarBridge is a Model Context Protocol (MCP) connector that lets ChatGPT work with your Apple Calendar. It never uploads your events to a third party — every action runs on your own Mac through a tiny local agent. The cloud piece is only a stateless relay that shuttles requests between ChatGPT and your Mac.

ChatGPT  ──OAuth──►  CalendarBridge relay  ──job queue──►  calendar-agent  ──►  Calendar.app
 (connector)          (Vercel, stateless)      (your Mac, polls & executes)     (on your Mac)

Your Mac is the only place your events are ever read or written. The relay stores only short-lived job payloads and your account record; it never sees an event unless a job is in flight, and jobs expire in seconds.

For users — 3 steps

1. Create your account at calendarbridge.vercel.app and generate a pairing code.

2. Install the Mac agent (needs Node 18+):

npx calendar-agent pair <YOUR-CODE>   # link this Mac to your account
npx calendar-agent install            # keep it running on every restart

The first time it touches Calendar, macOS asks "Terminal wants to control Calendar" — click OK (one time).

3. Connect ChatGPT: Settings → Plugins → turn on Developer mode (Security & login) → Create a custom plugin → paste the MCP Server URL https://calendarbridge.vercel.app/mcp → Authentication OAuth → sign in & Allow.

That's it. In a new chat: "Search my Apple Calendar for the dentist appointment" or "Add a Team Standup to my Work calendar tomorrow at 9am."

Your Mac must be awake with the agent running. npx calendar-agent install makes it start automatically at login and restart if it ever crashes.

Managing the agent

npx calendar-agent status      # is it paired & reachable?
npx calendar-agent logs        # recent activity
npx calendar-agent uninstall   # stop auto-start

What ChatGPT can do

Self-hosting

You can run your own relay so nothing depends on the hosted instance.

Prereqs: a Vercel account and a Supabase project (free tiers are fine).

  1. Storage — in your Supabase project's SQL editor, run supabase/schema.sql. It creates a tiny Redis-shaped KV + queue surface (nb_* functions) with RLS on.
  2. Deploy the server/ directory to Vercel.
  3. Set env vars (see server/.env.example):
  • SUPABASEURL, SUPABASESERVICEROLEKEY — your project + service-role key
  • JWT_SECRET — openssl rand -hex 32
  1. Verify: curl https://YOUR-APP.vercel.app/api/health → redisConfigured, redisOk, jwtSecretSet all true.
  2. Point the agent at it: npx calendar-agent pair --server https://YOUR-APP.vercel.app.

How it works

Shortened. The full README is on GitHub.

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

Calendar Bridge: common questions

Is Calendar Bridge MCP server safe?
Yes, by our scan: it is graded A (97/100). Read the Calendar Bridge safety report
How do I install Calendar Bridge?
It runs remotely at calendarbridge.vercel.app. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
Does Calendar Bridge need an API key?
No key to paste: it signs you in with OAuth when your client connects.
Is Calendar Bridge maintained?
The last commit was 12 days ago (2026-10-24). The latest release is v1.3.0.
Is Calendar Bridge up?
100% of our last 28 checks got an answer. We check remote servers about four times a day.
What can I use instead of Calendar Bridge?
Servers from other publishers that do the same job: Vercel MCP server.
How does Calendar Bridge compare with other Developer tools MCP servers?
safety score 97/100 (higher than 98% of 1,119 Developer tools servers); uptime 100% (of our recent checks; the typical remote Developer tools server answers 100%); response time 235 ms (faster than 59% of 443 Developer tools servers). Full comparison.

Alternatives to Calendar Bridge

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

  • Vercel
    MCP server for Vercel — manage deployments and view build and runtime application logs.
    A

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