Business Day Calendars MCP Server

by workers-quietworklabs-business-days Your server? Claim it

answering

Business Day Calendars is answering right now. Last checked 11 min ago. It exposes 6 tools.

NYSE, Federal Reserve, TARGET2 and UK business days, holidays and T+N settlement dates.

Uptime history 7 days of history

7 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

203 ms

Response time

average over 24h

open, no key

Access

streamable-http

Nothing serious here today

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

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.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add business-days --transport http https://business-days.quietworklabs.workers.dev/mcp

Settings → Connectors → Add custom connector, then paste this address

https://business-days.quietworklabs.workers.dev/mcp

~/.codex/config.toml

[mcp_servers.business-days]
url = "https://business-days.quietworklabs.workers.dev/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "business-days": {
      "url": "https://business-days.quietworklabs.workers.dev/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "business-days": {
      "type": "http",
      "url": "https://business-days.quietworklabs.workers.dev/mcp"
    }
  }
}

Available tools 6

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

Adds (or with negative days subtracts) N business days to a date on a joint calendar (NYSE, Fedwire/FedACH, TARGET2, UK) and lists the holidays skipped. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

business_days_between

Counts business days between two dates on a joint calendar: days after start up to and including end (inclusive=true also counts start). Negative if end is before start. Lists weekday holidays in range. Max 10 years. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

is_business_day

Whether a date is a business day on one or more settlement calendars (NYSE, Fedwire/FedACH, TARGET2, UK), which holiday closes it, NYSE early closes, and the previous/next business day. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

adjust

adjust_date

Rolls a date that falls on a weekend or holiday using a business-day convention: following, modified_following, preceding, modified_preceding. Typical for payment, coupon and invoice due dates. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

holidays

list_holidays

Lists closing days for one calendar and year (2000-2099): NYSE full closures and 1 pm early closes, Federal Reserve (Fedwire/FedACH) holidays with Saturday/Sunday observance rules, TARGET2 closing days, UK England & Wales bank holidays with substitute days. Weekend-only holidays with no weekday closure are omitted. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

settlement

settlement_date

Settlement date T+N for a trade date on a joint calendar. Default XNYS,FED with t=1 (US equities since 28 May 2024). If the trade date is not a business day it is first rolled to the next one. Deterministic, no AI. Price: $0.001 USDC per call via x402 (Base); the first 5 calls per day per client are free.

Endpoints

URL	Transport	State	Latency	Checked
https://business-days.quietworklabs.workers.dev/mcp	streamable-http	answering	171 ms	11 min ago

Alternatives to Business Day Calendars

same job, measured the same way

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Japanese holidays, business days, eras, postal codes, addresses and corporate numbers.

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World Business Calendar

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Public holidays and working-day math for 200+ countries and regions, local weekends. No keys.

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Business Day Calendars — questions

Answers built from our own checks of this server.

What can Business Day Calendars do?

It exposes 6 tools, read directly from the server on our last check. Among them: add_business_days, adjust_date, business_days_between, is_business_day, list_holidays, settlement_date. 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 Business Day Calendars working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 203 ms. The bar chart above shows every period we have measured.

How do I connect Business Day Calendars?

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 Business Day Calendars need an API key?

No. Business Day Calendars completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Business Day Calendars?

It answers our handshake in 203 ms on average, which is faster than 78% 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.