Legal & GovernmentMCP Registryremote6 toolsD · 33

Business Day Calendars MCP server

dev.workers.quietworklabs.business-days · Updated 11d ago

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

At a glance

Business Day Calendars is an MCP server in the Legal & Government category. It is hosted remotely and connects over HTTP, and declares no required credentials. It exposes 6 tools, including is_business_day, add_business_days and settlement_date. It scores D (33/100) on the MCP Skills Hub health score as of Oct 28, 2026.

Source

One-click install

VS Code VS Code Insiders Cursor

Opens your editor and pre-fills the config. Your editor will ask before adding it.

How to install Business Day Calendars in your AI client

Setup for Claude Code, Claude Desktop, Cursor, Codex, Windsurf, Cline and VS Code — copy-paste ready.

How to install Business Day Calendars in Claude CodeAnthropic's agentic CLI

Add the server

bash

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

2
Verify it's connected
bash
```
claude mcp list
```
Sharing it with your team?
Add `--scope project` to write it to .mcp.json in the repository root, which you can commit (with the secrets left as environment variables).
Use it in a session
Ask Claude to use the tools this server exposes (e.g. is_business_day, add_business_days, settlement_date). It discovers them automatically.

How to install Business Day Calendars in Claude DesktopDesktop app (MCP config)

Open your MCP config
macOS: ~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

Add this server

json

{
  "mcpServers": {
    "business-days": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://business-days.quietworklabs.workers.dev/mcp"
      ]
    }
  }
}

Why the wrapper?
This is a remote (HTTP) server and Claude Desktop only launches local processes, so mcp-remote proxies the connection. It will open a browser window if the server needs OAuth.
Restart Claude Desktop
The tools appear under the 🔌 menu once the app reloads.

How to install Business Day Calendars in CursorAI-first code editor

Create / edit .cursor/mcp.json in your project

json

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

Enable it
Cursor Settings → MCP → toggle the server on. Tools become available to the Composer/Agent.

How to install Business Day Calendars in Codex CLIOpenAI coding agent

Add to ~/.codex/config.toml

toml

[mcp_servers.business-days]
command = "npx"
args = ["-y", "mcp-remote", "https://business-days.quietworklabs.workers.dev/mcp"]

Why the wrapper?
Codex runs MCP servers as local processes, so mcp-remote bridges this HTTP endpoint to stdio.
Run Codex
Codex loads MCP servers from config.toml on startup and exposes their tools to the agent.

How to install Business Day Calendars in WindsurfCodeium's agentic IDE

Edit ~/.codeium/windsurf/mcp_config.json

json

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

Reload
Windsurf → Cascade → refresh MCP servers. Cascade can now call the tools.

How to install Business Day Calendars in ClineVS Code autonomous agent

Open Cline → MCP Servers → Configure
Adds to cline_mcp_settings.json.

Add the server

json

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

How to install Business Day Calendars in VS CodeCopilot / MCP support

Create .vscode/mcp.json

json

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

Start it
VS Code shows a ▶ Start action above the server entry. Agent mode (Copilot Chat) can then use the tools.

What tools does Business Day Calendars expose? (6)

Read from the live server. Click any tool for its input schema.

is_business_dayWhether 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.
add_business_daysAdds (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.
settlement_dateSettlement 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.
business_days_betweenCounts 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.
adjust_dateRolls 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.
list_holidaysLists 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 call

What the code can do

This is a remote server — nothing is installed or run on your machine, so there is no local code to analyze. What it can reach is described above: your requests go to the provider's host.

Before you install

Signals gathered from the source repo and package registry — not a safety verdict.

What it can reach

Third-party hosted service — Your requests and any data in them are sent to business-days.quietworklabs.workers.dev.
No local execution — Nothing is installed or run on your machine.

No source repository — This registry entry does not link to a public repo, so its code cannot be reviewed before you install it.

Client compatibility

Claude Code: NativeClaude Desktop: Via mcp-remoteCursor: NativeCodex CLI: Via mcp-remoteWindsurf: NativeCline: NativeVS Code: Native

Health score

D · 33

Maintenance, adoption, transparency and packaging — not a safety audit. How this is calculated

Maintenance30%not measurable
No commit history available.
Adoption20%not measurable
No usage data available.
Transparency20%25%
1/4: ✗ public source repo, ✗ declared license, ✗ documentation, ✓ discoverable tool list.
Provenance15%0%
No source repository to trace the code back to.
Packaging15%75%
Remote endpoint; authentication requirements not declared.

Alternatives to Business Day Calendars

Maintain Business Day Calendars? Add a badge to your README

Shows its health grade, and links readers to install steps for every client.

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