Holiday Calendar MCP Server

by modernmustardseedcom.modernmustardseed/holiday-calendarv1.0.1

U.S. federal holidays with observed dates and business-day math. Example from an open-source kit.

0remoteofficial registry

context tax

pending

security

pending

cold start

hosted

freshness

pending

Our reading of Holiday Calendar, from the data

Holiday Calendar is a calendar & scheduling MCP server from modernmustardseed, listed in the official MCP Registry.

We haven't measured its tool list yet, so its token cost is unknown.

With 0 GitHub stars it ranks #162 of 484 calendar & scheduling servers we index.

It runs as a hosted endpoint, so there is nothing to install.

Install Holiday Calendar MCP server

claude mcp add --transport http small-business-mcp-starter https://starter.modernmustardseed.com/holidays

{
  "mcpServers": {
    "small-business-mcp-starter": {
      "url": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

{
  "mcpServers": {
    "small-business-mcp-starter": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://starter.modernmustardseed.com/holidays"
      ]
    }
  }
}

Or add it as a custom connector under Settings → Connectors. The config above bridges via mcp-remote.

{
  "servers": {
    "small-business-mcp-starter": {
      "type": "http",
      "url": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

{
  "mcpServers": {
    "small-business-mcp-starter": {
      "serverUrl": "https://starter.modernmustardseed.com/holidays"
    }
  }
}

Remote endpoints

streamable-httphttps://starter.modernmustardseed.com/holidays

Freshness

Not enough public signals yet to judge maintenance.

Last commit (default branch)
2026-10-12 · 6d ago · GitHub
Latest release
no data · GitHub
Package published
no data · npm/PyPI
Registry entry updated
2026-10-12 · 6d ago · official registry · v1.0.1

How it compares in Calendar & Scheduling

Against the most-starred calendar & scheduling servers we index. Token cost is per model turn, measured from each server's live tool list.

Server	Stars	Tools	Tokens / turn	Freshness	Runs
Holiday Calendar (this)	0	—	not measured	—	hosted
Google Workspace	3,370	—	not measured	Active	—
Vexa	2,889	—	not measured	Active	hosted
Minutes	1,557	—	not measured	Active	local
Google Calendar	1,200	—	not measured	—	local
Microsoft 365	1,058	—	not measured	Active	local

All calendar & scheduling MCP servers

FAQ

›How do I install the Holiday Calendar MCP server in Claude Code?

Run: claude mcp add --transport http small-business-mcp-starter https://starter.modernmustardseed.com/holidays. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Holiday Calendar require an API key?

No required environment variables are declared in its published metadata.

›Can I use Holiday Calendar as a remote (hosted) MCP server?

Yes. It is a hosted MCP server; connect to its URL with any client that supports remote MCP.

›Is Holiday Calendar in the official MCP registry?

Yes, as com.modernmustardseed/holiday-calendar.

Sources and method

Official MCP Registry entry: updated 2026-10-12
GitHub repository: fetched 2026-10-19
Last checked against all sources: 2026-10-19

The description, packages and links come from the maintainer's own published metadata. Token cost, security signals, freshness and the reading above are MCPSkillHub's own measurements; see the methodology. Spot an error? Request a correction or claim the listing.