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Workday Calendar MCP Server

by workers-regnotes-workday-calendar Your server? Claim it
answering

Workday Calendar is answering right now. Last checked 15 min ago. It exposes 4 tools.

Public holidays and business-day math (T+N, counts) for many countries; pay per call via x402

Uptime history 6 hours of history
6 hours agonow
100.0%
Uptime 24h
19 of 19 checks
4
Tools
read from the server
300 ms
Response time
average over 24h
open, no key
Access
streamable-http

Nothing serious here today

Today is the operative word: we check Workday Calendar every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

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 15 min ago.

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

Available tools 4

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

business
business_day
Whether a date is a business day in a country (holiday/weekend/make-up workday aware), plus the previous and next business day. Costs $0.001 USDC on Base via x402.
business_days_add
Date that is N business days after (or before, if negative) a start date in a country. Typical use: T+2 settlement, SLA and filing deadlines. Costs $0.002 USDC on Base via x402.
business_days_count
Number of business days in [start, end] inclusive (max 3 years), with the holidays that fell on weekdays. Costs $0.002 USDC on Base via x402.
holidays
holidays
All national public holidays for a country and year, with weekend definition and official weekend make-up workdays. Costs $0.002 USDC on Base via x402.

Endpoints

URLTransportStateLatencyChecked
https://workday-calendar.regnotes.workers.dev/mcp streamable-http answering 377 ms 15 min ago

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N
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Workday Calendar — questions

Answers built from our own checks of this server.

What can Workday Calendar do?
It exposes 4 tools, read directly from the server on our last check. Among them: business_day, business_days_add, business_days_count, holidays. 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 Workday Calendar working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 19 of 19 checks got a reply (100.0%), average response time 300 ms. The bar chart above shows every period we have measured.
How do I connect Workday Calendar?
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 Workday Calendar need an API key?
No. Workday Calendar completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 4 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is Workday Calendar?
It answers our handshake in 300 ms on average, which is faster than 55% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.