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WorkdayAPI MCP Server

by workers-mike-tusa-workdayapi Your server? Claim it
answering

WorkdayAPI is answering right now. Last checked 5 min ago. It exposes 5 tools.

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

Uptime history 5 days of history
5 days agonow
100.0%
Uptime 24h
92 of 92 checks
5
Tools
read from the server
61 ms
Response time
average over 24h
open, no key
Access
streamable-http

What changed 1

Every tool that appeared, vanished or quietly changed what it asks for. Recorded since 16 October 2026. No other catalogue keeps this.

16 Oct a tool changed version

Nothing serious here today

Today is the operative word: we check WorkdayAPI 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 5 min ago.

run in your terminal
claude mcp add workdayapi --transport http https://workdayapi.mike-tusa.workers.dev/mcp
~/Library/Application Support/Claude/claude_desktop_config.json
{
  "mcpServers": {
    "workdayapi": {
      "url": "https://workdayapi.mike-tusa.workers.dev/mcp"
    }
  }
}
~/.codex/config.toml
[mcp_servers.workdayapi]
url = "https://workdayapi.mike-tusa.workers.dev/mcp"
.cursor/mcp.json
{
  "mcpServers": {
    "workdayapi": {
      "url": "https://workdayapi.mike-tusa.workers.dev/mcp"
    }
  }
}
.vscode/mcp.json
{
  "mcpServers": {
    "workdayapi": {
      "url": "https://workdayapi.mike-tusa.workers.dev/mcp"
    }
  }
}

Available tools 5

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

business
add_business_days
Add (or, with a negative number, subtract) business days to a date, skipping weekends and public holidays of the country (and region). Returns the result date and the holidays skipped. Read-only. Same engine, cache and limits as GET /v1/add.
business_days_between
Count business days between two dates in a country (and region), excluding weekends and public holidays. The end date is excluded unless inclusive is true. Returns business, weekend and holiday day counts and the holidays in the range. Read-only. Same engine, cache and limits as GET /v1/between.
is_business_day
Check whether a date is a business day in a country (and region), considering weekends and public holidays. Returns the reason (weekend or holiday name) plus the previous and next business days. Read-only. Same engine, cache and limits as GET /v1/is-business-day.
countries
list_countries
List the supported countries (ISO codes), their regions and the supported year range. Read-only. Same data and limits as GET /v1/countries.
holidays
get_holidays
List the public (and optionally bank/observance) holidays for one country (and region) in one year, 2020-2035, with local names, types and official source links. Read-only. Same data, cache and limits as GET /v1/holidays.

Endpoints

URLTransportStateLatencyChecked
https://workdayapi.mike-tusa.workers.dev/mcp streamable-http answering 58 ms 5 min ago

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WorkdayAPI — questions

Answers built from our own checks of this server.

What can WorkdayAPI do?
It exposes 5 tools, read directly from the server on our last check. Among them: add_business_days, business_days_between, get_holidays, is_business_day, list_countries. 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 WorkdayAPI working right now?
We send a real MCP handshake every 15 minutes. Over the last 24 hours 92 of 92 checks got a reply (100.0%), average response time 61 ms. The bar chart above shows every period we have measured.
How do I connect WorkdayAPI?
Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.
Does WorkdayAPI need an API key?
No. WorkdayAPI completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 5 of them are readable on this page. This is what we observed, not what the docs claim.
How fast is WorkdayAPI?
It answers our handshake in 61 ms on average, which is faster than 93% of all working MCP servers we measure. That puts it in the quick quarter of the ecosystem. The comparison comes from our own checks across the whole registry, every 15 minutes.