mcpbeat Sign in

Openworkdays MCP Server

answering

Openworkdays is answering right now. Last checked 11 min ago. It exposes 1 tools. Last commit 17 May 2026.

Zero-signup business-day date-math API: add days, count days between dates, is-business-day.

Uptime history 91 days of history · worst day 43%
91 days agonow
84.6%
Uptime 24h
77 of 91 checks
1
Tools
read from the server
270 ms
Response time
average over 24h
0
Stars
last commit 17 May 2026

Openworkdays does not always answer

Over the last week it answered 82.5% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Three servers free · no card

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 11 min ago.

run in your terminal
claude mcp add openworkdays --transport http https://openworkdays.vercel.app/api/mcp
Settings → Connectors → Add custom connector, then paste this address
https://openworkdays.vercel.app/api/mcp
~/.codex/config.toml
[mcp_servers.openworkdays]
url = "https://openworkdays.vercel.app/api/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "openworkdays": {
      "url": "https://openworkdays.vercel.app/api/mcp"
    }
  }
}
.vscode/mcp.json
{
  "servers": {
    "openworkdays": {
      "type": "http",
      "url": "https://openworkdays.vercel.app/api/mcp"
    }
  }
}

Available tools 1

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

businessdays
businessdays
Business-day date math. Three modes inferred from params: add (start+days -> the date N business days away, negative days = before), diff (start+end -> count of business days between, inclusive of both endpoints), is (date -> is it a business day). Optional weekend (default sat,sun) and holidays (comma list of YYYY-MM-DD you supply). No signup, no API key. Pure UTC date-only math; no time-of-day/DST/timezone.

Endpoints

URLTransportStateLatencyChecked
https://openworkdays.vercel.app/api/mcp streamable-http answering 249 ms 11 min ago

Alternatives to Openworkdays

same job, measured the same way
WorkdayAPI
by workers-mike-tusa-workdayapi

Business-day and public-holiday math for 29 countries: add business days, days between, holidays.

5 tools answering
MCP Time
by infoinlet-marketplace

Time & date for AI agents — timezones, conversion, date math, diffs, cron, business days.

47 installs/wk local only
Date Math Calculator
by apished

Date arithmetic: day differences, business days, age, leap years, day-of-week, add/subtract.

6 tools answering
Bizdays
by qinisolabs

Verified business-day math for AI agents: holidays + per-country weekends, not guesses.

49 installs/wk local only
Zovo Date Calculator
by theluckystrike

Days between dates & workdays

3 tools answering
CalKit
by olsols4

Public holidays for 150+ countries, business-day maths and timezone lookup

answering
Savvycal MCP
by mrfentmen

Timezone, business-day and meeting-slot maths - no API key.

479 installs/wk local only
T
Türkiye Business Days & Public Holidays
by foster-ops

Türkiye public holidays (incl. half-day eves, Diyanet dates) and business-day math, 2022–2035.

4 tools answering

Openworkdays — questions

Answers built from our own checks of this server.

What can Openworkdays do?
It exposes 1 tools, read directly from the server on our last check. Among them: businessdays. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →
Is Openworkdays working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 77 of 91 checks got a reply (84.6%), average response time 270 ms. The bar chart above shows every period we have measured.
How do I connect Openworkdays?
Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does Openworkdays need an API key?
No. Openworkdays completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 1 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Openworkdays?
It answers our handshake in 270 ms on average, which is faster than 53% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.
Is Openworkdays open source?
The code is open source: it is published under the MIT licence, written in JavaScript and 0 stars on GitHub. The licence covers the code in the repository, not the hosted service at openworkdays.vercel.app, which runs on its operator's own terms.