Cron MCP

Name: Cron MCP
Author: takeaseatventure

by takeaseatventureversion 0.1.2i★ –iRuns on your computer

Registry nameio.github.takeaseatventure/cron-mcp

Install

Overview

Description from the maker (original English)

MCP cron validator for AI agents; flags impossible schedules and other silent cron bugs.

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
UsageiVery new↓ 55/wk · ★ –

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 on your computer
Transport: stdio
Category: Other

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "cron": {
      "command": "npx",
      "args": [
        "-y",
        "cron-mcp-server"
      ]
    }
  }
}

Run this in your terminal

claude mcp add cron -- npx -y cron-mcp-server

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "cron": {
      "command": "npx",
      "args": [
        "-y",
        "cron-mcp-server"
      ]
    }
  }
}

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": {
    "cron": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "cron-mcp-server"
      ]
    }
  }
}

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 one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 9, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account takeaseatventure, which owns the repo
… 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Otheri

More stars than 0% of the other 18665 servers in this category
Published to the registry more recently than 18% of the other 18665 servers in this category
Basic checks equal to or better than 100% of the other 18665 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 Cron MCP 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?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.2) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Systemdox

Alternatives

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

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

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Install

Remote Desktop Commander

Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.

by desktop-commanderGrowing★ 211Updated 4 days ago

Runs in the cloud✓ desktopcommander.app

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Systemdox

Your architecture in your agents' context: checks, specs, ADRs and docs over MCP, at write time.

by pugliesewebGrowing↓ 3K/wkUpdated today

Runs on your computer

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.

cron-mcp

An MCP (Model Context Protocol) server that lets AI coding agents — Claude, Cursor, Copilot, Cline — parse, validate, explain, and preview cron expressions.

Built to catch silent cron bugs (impossible schedules, OR-semantics gotchas, midnight spikes) *before* a job is deployed — a class of mistake that's easy to make and hard to notice until a critical job silently fails to fire.

Why

Cron expressions are deceptively tricky. Common silent failures:

0 0 30 2 * → never runs (February has no 30th). Syntactically valid, semantically dead.
0 0 1,15 * 1 → fires on the 1st OR 15th OR Monday, not "the 1st and 15th if Monday" (the classic dom+dow OR-semantics trap).
*/7 * * * * → uneven step; intervals drift (:00, :07, :14, …, :56, :00 — not "every 7 minutes" cleanly).
0 0 * * * → midnight spike; every job in the system competes at 00:00.

cron-mcp surfaces these as warnings, observations, and suggestions that the AI agent can act on — *before* you ship the schedule.

Tools exposed

Tool	Description
`parse_cron`	Parse a cron expression → plain-English description of when it fires. Supports 5-field standard cron + `L` (last), `W` (nearest weekday), `#` (nth weekday), named months/days.
`validate_cron`	Deep validation: impossible schedules, OR-semantics, midnight spikes, uneven steps, leap-year edges, frequency estimate (~runs/year).
`next_runs`	Compute the next N fire times as ISO-8601 + relative offsets.
`cron_presets`	Library of common, proven schedules (every 5 min, hourly, weekdays 9am, monthly, quarterly, …).

Install

npm install -g cron-mcp-server

Published links

npm package — installable release 0.1.2
Official MCP Registry — registry record
GitHub release — downloadable source checkpoint

Configure

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or the equivalent on your OS:

"mcpServers": { "cron": { "command": "cron-mcp-server", "args": [] } } }

Cursor

Add to .cursor/mcp.json (or ~/.cursor/mcp.json for global):

"mcpServers": { "cron": { "command": "cron-mcp-server" } } }

VS Code (Copilot)

"mcp.servers": { "cron": { "type": "stdio", "command": "cron-mcp-server" } } }

Direct (no install)

npx cron-mcp-server

Example usage

Once connected, just ask the agent in natural language:

*"Validate this cron: 0 0 30 2 *"*
*"When does */5 * * * * next fire?"*
*"Give me a cron for every weekday at 9am"*
*"Is there anything risky about 0 0 1,15 * 1?"*

The agent calls the tools and returns structured, actionable results.

Engine

The cron engine is battle-tested: 638 lines, zero dependencies, originally extracted from a browser-based cron generator and hardened with 69 unit tests. This MCP server is a thin tool wrapper around it.

Cron MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Systemdox

README from the maker

cron-mcp

Why

Tools exposed

Install

Published links

Configure

Claude Desktop

Cursor

VS Code (Copilot)

Direct (no install)

Example usage

Engine

License