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Business Day Calendars

Official registry Productivity

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

Website

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

Remote (streamable-http)
Claude Code 
claude mcp add --transport http business-day-calendars 'https://business-days.quietworklabs.workers.dev/mcp'
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "business-day-calendars": {
            "type": "http",
            "url": "https://business-days.quietworklabs.workers.dev/mcp"
        }
    }
}

Frequently asked questions

What is Business Day Calendars?

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

How do I install Business Day Calendars?

It runs as a remote server. In Claude Code: claude mcp add --transport http business-day-calendars 'https://business-days.quietworklabs.workers.dev/mcp'. For other clients, paste the JSON configuration from this page into their MCP settings.

Does Business Day Calendars need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Who maintains Business Day Calendars?

It is published by dev.workers.quietworklabs.business-days. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.