Spec Driven Development
MCP Server that facilitates spec-driven development workflows, not just Vibe Coding.
Runs on your computer
Cron Schedule Audit
Overview
Description from the maker (original English)
Validates cron expressions and finds DST bugs that make jobs silently skip or double-fire.
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★ –
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: Other
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.
- The registry lists no key to fill in.
You need
- Runs in the cloudNothing to install; it connects over the internet
Which app do you use?
Pick your app above. We remember it, so next time the button says “Install in …”.
Works in Claude on the web, desktop and mobile:
- Open Settings → Connectors
- Press Add custom connector
- Paste the address below and press Add
- If it asks you to sign in, sign in with the maker
https://cron-schedule-audit-mcp.mcpize.run/mcpRun this in your terminal
claude mcp add --transport http cron-schedule-audit https://cron-schedule-audit-mcp.mcpize.run/mcpOr copy the settings yourself
Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json
{
"mcpServers": {
"cron-schedule-audit": {
"url": "https://cron-schedule-audit-mcp.mcpize.run/mcp"
}
}
}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.
Or copy the settings yourself
Paste into .vscode/mcp.json in your project
{
"servers": {
"cron-schedule-audit": {
"type": "http",
"url": "https://cron-schedule-audit-mcp.mcpize.run/mcp"
}
}
}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.
ChatGPT connects only to servers on the internet:
- Open ChatGPT on the web → Settings → Connectors (Apps)
- Press Create or Add (some plans need Developer mode under Advanced first)
- Paste the address below, give it a name and save
- If it asks you to sign in, sign in with the maker
https://cron-schedule-audit-mcp.mcpize.run/mcpMenu names can differ slightly by plan and over time.
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
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 8, 2026
- ✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account tylerscomic-lab, 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 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 Otheri
- More stars than 0% of the other 18495 servers in this category
- Published to the registry more recently than 17% of the other 18495 servers in this category
- Basic checks equal to or better than 100% of the other 18495 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 Schedule Audit 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 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 4 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: Spec Driven Development, Remote Desktop Commander, Thth
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
Remote Desktop Commander
Remote Desktop Commander: use files, terminal and processes on your own computers from any AI app.
Runs in the cloud✓ desktopcommander.app
Thth
Call before you post: ships a draft to Threads/Bluesky/Mastodon only after a person approved it.
Runs on your computer
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-schedule-audit-mcp
An MCP server that validates cron expressions and computes DST-correct next-fire times using the real IANA timezone database — no moment-timezone or luxon dependency, just a hand-rolled fake-UTC-offset technique against the platform's own tz data.
The bug this catches
A cron job scheduled at 30 2 * * * (2:30am daily) in America/New_York silently never fires on the spring-forward date, because 2:00-2:59am doesn't exist that day. A job at 30 1 * * * (1:30am) fires twice on the fall-back date, because that hour is repeated. Neither failure throws an error or shows up in logs — it just looks like a flaky cron that "sometimes doesn't run." Verified against real 2026/2027 transition dates during testing (spring-forward 2027-03-14, fall-back 2026-11-01).
Also flags the day-of-month/day-of-week footgun almost everyone hits once: POSIX cron treats both fields as OR, not AND, when both are restricted.
Tools
validate_cron_expression
Syntax + semantic validation: OR-not-AND warning, every-minute footgun, day-of-month values some months don't have (31, 30, 29), a nudge to check DST risk for anything in the 1-3am window. Returns a plain-English explanation of what the expression means.
get_next_fire_times
Next N fire times, DST-aware. If a scheduled local time falls in a spring-forward gap it's flagged as skipped; if it falls in a fall-back overlap, both real firings are returned as ambiguous.
detect_dst_risk
Scans a full year ahead and reports every date where the schedule collides with a DST transition — run this once on any job scheduled in the 1-4am local window before you ship it.
Use it
Hosted (recommended): MCPize — free tier, $7/mo Pro.
Self-host:
npm installnode server.js
Part of a small suite
mcp-schema-audit-mcp, regex-safety-audit-mcp, claude-cost-audit-mcp.
License
MIT